diff --git a/extensions/matrix/src/actions.account-propagation.test.ts b/extensions/matrix/src/actions.account-propagation.test.ts
index 77652a8e6b7c..8afb03fde4eb 100644
--- a/extensions/matrix/src/actions.account-propagation.test.ts
+++ b/extensions/matrix/src/actions.account-propagation.test.ts
@@ -171,15 +171,21 @@ describe("matrixMessageActions account propagation", () => {
   });
 
   it("forwards mediaLocalRoots for media sends", async () => {
+    const mediaAccess = {
+      localRoots: ["/tmp/openclaw-matrix-test"],
+      readFile: async () => Buffer.from("chart"),
+      workspaceDir: "/tmp/openclaw-matrix-test",
+    };
     await matrixMessageActions.handleAction?.(
       createContext({
         action: "send",
         accountId: "ops",
-        mediaLocalRoots: ["/tmp/openclaw-matrix-test"],
+        mediaAccess,
+        mediaLocalRoots: mediaAccess.localRoots,
         params: {
           to: "room:!room:example",
           message: "hello",
-          media: "file:///tmp/photo.png",
+          media: "chart.png",
         },
       }),
     );
@@ -187,8 +193,9 @@ describe("matrixMessageActions account propagation", () => {
     const call = matrixActionCall();
     expect(call.input.action).toBe("sendMessage");
     expect(call.input.accountId).toBe("ops");
-    expect(call.input.mediaUrl).toBe("file:///tmp/photo.png");
+    expect(call.input.mediaUrl).toBe("chart.png");
     expect(call.cfg).toBeTypeOf("object");
+    expect(call.options.mediaAccess).toBe(mediaAccess);
     expect(call.options).toMatchObject({ mediaLocalRoots: ["/tmp/openclaw-matrix-test"] });
   });
 
diff --git a/extensions/matrix/src/actions.ts b/extensions/matrix/src/actions.ts
index cde69547f9bd..1f58ae56988a 100644
--- a/extensions/matrix/src/actions.ts
+++ b/extensions/matrix/src/actions.ts
@@ -176,6 +176,7 @@ export const matrixMessageActions: ChannelMessageActionAdapter = {
         },
         cfg as CoreConfig,
         {
+          ...(action === "send" && ctx.mediaAccess ? { mediaAccess: ctx.mediaAccess } : {}),
           mediaLocalRoots,
           readContext: {
             accountId,
diff --git a/extensions/matrix/src/matrix/actions/messages.test.ts b/extensions/matrix/src/matrix/actions/messages.test.ts
index 6f45a094b6a9..31060e62bc23 100644
--- a/extensions/matrix/src/matrix/actions/messages.test.ts
+++ b/extensions/matrix/src/matrix/actions/messages.test.ts
@@ -3,7 +3,7 @@ import { describe, expect, it, vi } from "vitest";
 import { setMatrixRuntime } from "../../runtime.js";
 import type { MatrixClient } from "../sdk.js";
 import * as sendModule from "../send.js";
-import { editMatrixMessage, readMatrixMessages } from "./messages.js";
+import { editMatrixMessage, readMatrixMessages, sendMatrixMessage } from "./messages.js";
 
 const MATRIX_ACTION_TEST_CFG = {
   channels: {
@@ -177,6 +177,34 @@ function mockCallArg(
 }
 
 describe("matrix message actions", () => {
+  it("preserves workspace media access through the shared Matrix send helper", async () => {
+    const mediaAccess = {
+      localRoots: ["/tmp/openclaw-matrix-test"],
+      readFile: async () => Buffer.from("chart"),
+      workspaceDir: "/tmp/openclaw-matrix-test",
+    };
+    const sendSpy = vi.spyOn(sendModule, "sendMessageMatrix").mockResolvedValue({
+      messageId: "$sent",
+      roomId: "!room:example.org",
+    } as never);
+
+    try {
+      await sendMatrixMessage("!room:example.org", "caption", {
+        cfg: MATRIX_ACTION_TEST_CFG,
+        mediaUrl: "chart.png",
+        mediaAccess,
+        mediaLocalRoots: mediaAccess.localRoots,
+      });
+
+      const options = sendSpy.mock.calls[0]?.[2];
+      expect(options?.mediaUrl).toBe("chart.png");
+      expect(options?.mediaAccess).toBe(mediaAccess);
+      expect(options?.mediaLocalRoots).toBe(mediaAccess.localRoots);
+    } finally {
+      sendSpy.mockRestore();
+    }
+  });
+
   it("forwards timeoutMs to the shared Matrix edit helper", async () => {
     const editSpy = vi.spyOn(sendModule, "editMessageMatrix").mockResolvedValue("evt-edit");
 
diff --git a/extensions/matrix/src/matrix/actions/messages.ts b/extensions/matrix/src/matrix/actions/messages.ts
index 4e47d0fb2dfb..0242721bbb68 100644
--- a/extensions/matrix/src/matrix/actions/messages.ts
+++ b/extensions/matrix/src/matrix/actions/messages.ts
@@ -88,6 +88,7 @@ export async function sendMatrixMessage(
   return await sendMessageMatrix(to, content, {
     cfg: opts.cfg,
     mediaUrl: opts.mediaUrl,
+    ...(opts.mediaAccess ? { mediaAccess: opts.mediaAccess } : {}),
     mediaLocalRoots: opts.mediaLocalRoots,
     replyToId: opts.replyToId,
     threadId: opts.threadId,
diff --git a/extensions/matrix/src/matrix/actions/types.ts b/extensions/matrix/src/matrix/actions/types.ts
index 714da2b29a9e..58d97337d2f5 100644
--- a/extensions/matrix/src/matrix/actions/types.ts
+++ b/extensions/matrix/src/matrix/actions/types.ts
@@ -1,4 +1,5 @@
 // Matrix type declarations define plugin contracts.
+import type { OutboundMediaAccess } from "openclaw/plugin-sdk/media-runtime";
 import type { CoreConfig } from "../../types.js";
 import { MATRIX_REACTION_EVENT_TYPE } from "../reaction-common.js";
 import type { MatrixClient, MessageEventContent } from "../sdk.js";
@@ -30,6 +31,7 @@ export type RoomPinnedEventsEventContent = {
 export type MatrixActionClientOpts = {
   client?: MatrixClient;
   cfg?: CoreConfig;
+  mediaAccess?: OutboundMediaAccess;
   mediaLocalRoots?: readonly string[];
   timeoutMs?: number;
   accountId?: string | null;
diff --git a/extensions/matrix/src/matrix/send.test.ts b/extensions/matrix/src/matrix/send.test.ts
index 11a867478ec4..d82042b8a36b 100644
--- a/extensions/matrix/src/matrix/send.test.ts
+++ b/extensions/matrix/src/matrix/send.test.ts
@@ -510,15 +510,32 @@ describe("sendMessageMatrix media", () => {
 
   it("uploads media with url payloads", async () => {
     const { client, sendMessage, uploadContent } = makeClient();
+    const mediaAccess = {
+      localRoots: ["/tmp/openclaw"],
+      workspaceDir: "/tmp/openclaw",
+    };
 
     await sendMessageMatrix("room:!room:example", "caption", {
       client,
       cfg: {} as never,
-      mediaUrl: "file:///tmp/photo.png",
+      mediaUrl: "chart.png",
+      mediaAccess,
+      mediaLocalRoots: mediaAccess.localRoots,
     });
 
+    expect(mockCallArg(loadOutboundMediaFromUrlMock, "loadOutboundMediaFromUrl", 0)).toBe(
+      "chart.png",
+    );
+    const mediaOptions = requireRecord(
+      mockCallArg(loadOutboundMediaFromUrlMock, "loadOutboundMediaFromUrl", 1),
+      "outbound media options",
+    );
+    expect(mediaOptions.mediaAccess).toBe(mediaAccess);
+    expect(mediaOptions.mediaLocalRoots).toBe(mediaAccess.localRoots);
+
     const uploadArg = mockCallArg(uploadContent, "uploadContent", 0);
     expect(Buffer.isBuffer(uploadArg)).toBe(true);
+    expect(uploadArg).toEqual(Buffer.from("media"));
 
     const content = sentContent(sendMessage) as {
       url?: string;
diff --git a/extensions/matrix/src/matrix/send/types.ts b/extensions/matrix/src/matrix/send/types.ts
index bf0bc5441772..d32b78c8afb4 100644
--- a/extensions/matrix/src/matrix/send/types.ts
+++ b/extensions/matrix/src/matrix/send/types.ts
@@ -1,5 +1,6 @@
 // Matrix type declarations define plugin contracts.
 import type { MessageReceipt } from "openclaw/plugin-sdk/channel-outbound";
+import type { OutboundMediaAccess } from "openclaw/plugin-sdk/media-runtime";
 import type { CoreConfig } from "../../types.js";
 import { MATRIX_ANNOTATION_RELATION_TYPE, MATRIX_REACTION_EVENT_TYPE } from "../reaction-common.js";
 import type {
@@ -90,10 +91,7 @@ export type MatrixSendOpts = {
   cfg: CoreConfig;
   client?: import("../sdk.js").MatrixClient;
   mediaUrl?: string;
-  mediaAccess?: {
-    localRoots?: readonly string[];
-    readFile?: (filePath: string) => Promise<Buffer>;
-  };
+  mediaAccess?: OutboundMediaAccess;
   mediaLocalRoots?: readonly string[];
   mediaReadFile?: (filePath: string) => Promise<Buffer>;
   accountId?: string;
diff --git a/extensions/matrix/src/outbound.test.ts b/extensions/matrix/src/outbound.test.ts
index 319e6618a2e1..55d0c1c1a3f3 100644
--- a/extensions/matrix/src/outbound.test.ts
+++ b/extensions/matrix/src/outbound.test.ts
@@ -99,13 +99,18 @@ describe("matrixOutbound cfg threading", () => {
         },
       },
     } as OpenClawConfig;
+    const mediaAccess = {
+      localRoots: ["/tmp/openclaw"],
+      workspaceDir: "/tmp/openclaw",
+    };
 
     await matrixOutbound.sendMedia!({
       cfg,
       to: "room:!room:example",
       text: "caption",
-      mediaUrl: "file:///tmp/cat.png",
-      mediaLocalRoots: ["/tmp/openclaw"],
+      mediaUrl: "chart.png",
+      mediaAccess,
+      mediaLocalRoots: mediaAccess.localRoots,
       accountId: "default",
       audioAsVoice: true,
     });
@@ -115,7 +120,8 @@ describe("matrixOutbound cfg threading", () => {
     expect(call[1]).toBe("caption");
     const options = mockOptions(mocks.sendMessageMatrix, "sendMessageMatrix");
     expect(options.cfg).toBe(cfg);
-    expect(options.mediaUrl).toBe("file:///tmp/cat.png");
+    expect(options.mediaUrl).toBe("chart.png");
+    expect(options.mediaAccess).toBe(mediaAccess);
     expect(options.mediaLocalRoots).toEqual(["/tmp/openclaw"]);
     expect(options.audioAsVoice).toBe(true);
   });
diff --git a/extensions/matrix/src/outbound.ts b/extensions/matrix/src/outbound.ts
index a1efb2a4dd6b..64f50e6618f5 100644
--- a/extensions/matrix/src/outbound.ts
+++ b/extensions/matrix/src/outbound.ts
@@ -245,6 +245,7 @@ export const matrixOutbound: ChannelOutboundAdapter = {
     mediaUrl,
     mediaLocalRoots,
     mediaReadFile,
+    mediaAccess,
     deps,
     replyToId,
     threadId,
@@ -265,6 +266,7 @@ export const matrixOutbound: ChannelOutboundAdapter = {
       mediaUrl,
       mediaLocalRoots,
       mediaReadFile,
+      mediaAccess,
       replyToId: replyToId ?? undefined,
       threadId: resolvedThreadId,
       accountId: accountId ?? undefined,
diff --git a/extensions/matrix/src/tool-actions.test.ts b/extensions/matrix/src/tool-actions.test.ts
index bc0fc5da3504..126bd9e934ec 100644
--- a/extensions/matrix/src/tool-actions.test.ts
+++ b/extensions/matrix/src/tool-actions.test.ts
@@ -444,25 +444,32 @@ describe("handleMatrixAction pollVote", () => {
 
   it("accepts media-only message sends", async () => {
     const cfg = { channels: { matrix: { actions: { messages: true } } } } as CoreConfig;
+    const mediaAccess = {
+      localRoots: ["/tmp/openclaw-matrix-test"],
+      readFile: async () => Buffer.from("chart"),
+      workspaceDir: "/tmp/openclaw-matrix-test",
+    };
     await handleMatrixAction(
       {
         action: "sendMessage",
         accountId: "ops",
         to: "room:!room:example",
-        mediaUrl: "file:///tmp/photo.png",
+        mediaUrl: "chart.png",
       },
       cfg,
-      { mediaLocalRoots: ["/tmp/openclaw-matrix-test"] },
+      { mediaAccess, mediaLocalRoots: mediaAccess.localRoots },
     );
 
     expect(mocks.sendMatrixMessage).toHaveBeenCalledWith("room:!room:example", undefined, {
       cfg,
       accountId: "ops",
-      mediaUrl: "file:///tmp/photo.png",
+      mediaUrl: "chart.png",
+      mediaAccess,
       mediaLocalRoots: ["/tmp/openclaw-matrix-test"],
       replyToId: undefined,
       threadId: undefined,
     });
+    expect(mocks.sendMatrixMessage.mock.lastCall?.[2]?.mediaAccess).toBe(mediaAccess);
   });
 
   it("accepts shared media aliases and voice-send flags", async () => {
diff --git a/extensions/matrix/src/tool-actions.ts b/extensions/matrix/src/tool-actions.ts
index a5584c944e1a..0eff85b4279a 100644
--- a/extensions/matrix/src/tool-actions.ts
+++ b/extensions/matrix/src/tool-actions.ts
@@ -33,7 +33,7 @@ import {
   voteMatrixPoll,
   verifyMatrixRecoveryKey,
 } from "./matrix/actions.js";
-import type { MatrixMessageSummary } from "./matrix/actions/types.js";
+import type { MatrixActionClientOpts, MatrixMessageSummary } from "./matrix/actions/types.js";
 import { withAuthorizedMatrixReadTarget, type MatrixReadContext } from "./matrix/read-policy.js";
 import type { MatrixClient } from "./matrix/sdk.js";
 import { reactMatrixMessage } from "./matrix/send.js";
@@ -164,7 +164,9 @@ function readPositiveIntegerArrayParam(params: Record<string, unknown>, key: str
 export async function handleMatrixAction(
   params: Record<string, unknown>,
   cfg: CoreConfig,
-  opts: { mediaLocalRoots?: readonly string[]; readContext?: MatrixReadContext } = {},
+  opts: Pick<MatrixActionClientOpts, "mediaAccess" | "mediaLocalRoots"> & {
+    readContext?: MatrixReadContext;
+  } = {},
 ): Promise<AgentToolResult<unknown>> {
   const action = readStringParam(params, "action", { required: true });
   const accountId = readStringParam(params, "accountId") ?? undefined;
@@ -283,6 +285,7 @@ export async function handleMatrixAction(
               : undefined;
         const result = await sendMatrixMessage(to, content, {
           mediaUrl: mediaUrl ?? undefined,
+          ...(opts.mediaAccess ? { mediaAccess: opts.mediaAccess } : {}),
           mediaLocalRoots: opts.mediaLocalRoots,
           replyToId: replyToId ?? undefined,
           threadId: threadId ?? undefined,
diff --git a/extensions/telegram/src/action-runtime.test.ts b/extensions/telegram/src/action-runtime.test.ts
index e207863054a7..fab3c94b704a 100644
--- a/extensions/telegram/src/action-runtime.test.ts
+++ b/extensions/telegram/src/action-runtime.test.ts
@@ -74,6 +74,7 @@ const sendDurableMessageBatch = vi.fn(
     mediaAccess?: {
       localRoots?: readonly string[];
       readFile?: (filePath: string) => Promise<Buffer>;
+      workspaceDir?: string;
     };
   }) => {
     const payload = params.payloads[0] ?? {};
@@ -111,6 +112,7 @@ const sendDurableMessageBatch = vi.fn(
       asVideoNote: payload.videoAsNote,
       silent: params.silent,
       forceDocument: params.forceDocument,
+      ...(params.mediaAccess ? { mediaAccess: params.mediaAccess } : {}),
       mediaLocalRoots: params.mediaAccess?.localRoots,
       mediaReadFile: params.mediaAccess?.readFile,
     };
@@ -1392,22 +1394,64 @@ describe("handleTelegramAction", () => {
     expect(options.silent).toBe(true);
   });
 
-  it("forwards trusted mediaLocalRoots into sendMessageTelegram", async () => {
+  it("preserves host-owned workspace media access and legacy roots", async () => {
+    const mediaReadFile = vi.fn(async (_filePath: string) => Buffer.from("chart"));
+    const mediaAccess = {
+      localRoots: ["/tmp/agent-root"],
+      readFile: mediaReadFile,
+      workspaceDir: "/tmp/agent-root",
+    };
     await handleTelegramAction(
       {
         action: "sendMessage",
         to: "@testchannel",
         content: "Hello with local media",
+        mediaUrl: "chart.png",
+        mediaAccess: { localRoots: ["/tmp/model-root"], workspaceDir: "/tmp/model-root" },
       },
       telegramConfig(),
-      { mediaLocalRoots: ["/tmp/agent-root"] },
+      {
+        mediaAccess,
+        mediaLocalRoots: ["/tmp/conflicting-root"],
+        mediaReadFile: vi.fn(async (_filePath: string) => Buffer.from("untrusted")),
+      },
     );
+    const durableOptions = requireRecord(
+      mockCall(sendDurableMessageBatch, 0, "workspace media access")[0],
+      "workspace media access batch",
+    );
+    expect(durableOptions.mediaAccess).toBe(mediaAccess);
+    expect(durableOptions.session).toBeUndefined();
     const call = mockCall(sendMessageTelegram, 0, "local media roots");
     expect(call[0]).toBe("@testchannel");
     expect(call[1]).toBe("Hello with local media");
-    expect(requireRecord(call[2], "local media roots options").mediaLocalRoots).toEqual([
-      "/tmp/agent-root",
-    ]);
+    const sendOptions = requireRecord(call[2], "local media roots options");
+    expect(sendOptions.mediaUrl).toBe("chart.png");
+    expect(sendOptions.mediaAccess).toBe(mediaAccess);
+    expect(sendOptions.mediaLocalRoots).toEqual(["/tmp/agent-root"]);
+    expect(sendOptions.mediaReadFile).toBe(mediaReadFile);
+
+    await handleTelegramAction(
+      {
+        action: "sendMessage",
+        to: "@testchannel",
+        content: "Hello with legacy media roots",
+        mediaUrl: "legacy-chart.png",
+      },
+      telegramConfig(),
+      { mediaLocalRoots: ["/tmp/legacy-root"] },
+    );
+    const legacyDurableOptions = requireRecord(
+      mockCall(sendDurableMessageBatch, 1, "legacy media access")[0],
+      "legacy media access batch",
+    );
+    expect(legacyDurableOptions.mediaAccess).toEqual({ localRoots: ["/tmp/legacy-root"] });
+    expect(
+      requireRecord(
+        mockCall(sendMessageTelegram, 1, "legacy media roots")[2],
+        "legacy media options",
+      ).mediaLocalRoots,
+    ).toEqual(["/tmp/legacy-root"]);
   });
 
   it("forwards gateway client scopes into Telegram send target resolution", async () => {
diff --git a/extensions/telegram/src/action-runtime.ts b/extensions/telegram/src/action-runtime.ts
index 7c38358291f4..5c4567cbf598 100644
--- a/extensions/telegram/src/action-runtime.ts
+++ b/extensions/telegram/src/action-runtime.ts
@@ -346,6 +346,7 @@ export async function handleTelegramAction(
   params: Record<string, unknown>,
   cfg: OpenClawConfig,
   options?: {
+    mediaAccess?: ChannelMessageActionContext["mediaAccess"];
     mediaLocalRoots?: readonly string[];
     mediaReadFile?: (filePath: string) => Promise<Buffer>;
     sessionKey?: string | null;
@@ -562,12 +563,13 @@ export async function handleTelegramAction(
       quoteText,
     });
     const mediaAccess =
-      options?.mediaLocalRoots || options?.mediaReadFile
+      options?.mediaAccess ??
+      (options?.mediaLocalRoots || options?.mediaReadFile
         ? {
             ...(options.mediaLocalRoots ? { localRoots: options.mediaLocalRoots } : {}),
             ...(options.mediaReadFile ? { readFile: options.mediaReadFile } : {}),
           }
-        : undefined;
+        : undefined);
     const outboundSession = buildOutboundSessionContext({
       cfg,
       sessionKey: options?.sessionKey,
diff --git a/extensions/telegram/src/channel-actions.test.ts b/extensions/telegram/src/channel-actions.test.ts
index 7f859262c1cf..75f0f26463e4 100644
--- a/extensions/telegram/src/channel-actions.test.ts
+++ b/extensions/telegram/src/channel-actions.test.ts
@@ -44,6 +44,10 @@ describe("telegramMessageActions", () => {
   });
 
   it("forwards only host-owned mutation context to the runtime", async () => {
+    const mediaAccess = {
+      localRoots: ["/tmp/agent-root"],
+      workspaceDir: "/tmp/agent-root",
+    };
     await telegramMessageActions.handleAction?.({
       channel: "telegram",
       action: "delete",
@@ -51,9 +55,12 @@ describe("telegramMessageActions", () => {
         messageId: "9001",
         to: "-1001:topic:77",
         conversationReadOrigin: "direct-operator",
+        mediaAccess: { localRoots: ["/tmp/forged-root"], workspaceDir: "/tmp/forged-root" },
       },
       cfg: { channels: { telegram: { botToken: "tok" } } } as OpenClawConfig,
       accountId: "work",
+      mediaAccess,
+      mediaLocalRoots: ["/tmp/conflicting-root"],
       requesterAccountId: "work",
       conversationReadOrigin: "delegated",
       toolContext: {
@@ -68,6 +75,7 @@ describe("telegramMessageActions", () => {
       expect.anything(),
       expect.objectContaining({
         conversationReadOrigin: "delegated",
+        mediaAccess,
         requesterAccountId: "work",
         toolContext: expect.objectContaining({ currentMessageId: "9001" }),
       }),
@@ -76,6 +84,8 @@ describe("telegramMessageActions", () => {
       action: "deleteMessage",
       messageId: "9001",
     });
+    expect(handleTelegramActionMock.mock.calls[0]?.[0]).not.toHaveProperty("mediaAccess");
+    expect(handleTelegramActionMock.mock.calls[0]?.[2]?.mediaAccess).toBe(mediaAccess);
   });
 
   it("allows interactive-only sends", async () => {
diff --git a/extensions/telegram/src/channel-actions.ts b/extensions/telegram/src/channel-actions.ts
index f5324211c149..3165c237ed71 100644
--- a/extensions/telegram/src/channel-actions.ts
+++ b/extensions/telegram/src/channel-actions.ts
@@ -248,6 +248,7 @@ export const telegramMessageActions: ChannelMessageActionAdapter = {
     params,
     cfg,
     accountId,
+    mediaAccess,
     mediaLocalRoots,
     mediaReadFile,
     sessionKey,
@@ -263,6 +264,7 @@ export const telegramMessageActions: ChannelMessageActionAdapter = {
     }
     const {
       conversationReadOrigin: _modelConversationReadOrigin,
+      mediaAccess: _modelMediaAccess,
       requesterAccountId: _modelRequesterAccountId,
       toolContext: _modelToolContext,
       ...runtimeParams
@@ -282,6 +284,7 @@ export const telegramMessageActions: ChannelMessageActionAdapter = {
       },
       cfg,
       {
+        ...(mediaAccess !== undefined ? { mediaAccess } : {}),
         mediaLocalRoots,
         mediaReadFile,
         sessionKey,
diff --git a/extensions/telegram/src/outbound-adapter.test.ts b/extensions/telegram/src/outbound-adapter.test.ts
index 657e4d052075..e8558cd931f9 100644
--- a/extensions/telegram/src/outbound-adapter.test.ts
+++ b/extensions/telegram/src/outbound-adapter.test.ts
@@ -72,15 +72,20 @@ describe("telegramOutbound", () => {
     sendLocationTelegramMock.mockReset();
   });
 
-  it("forwards mediaLocalRoots in direct media sends", async () => {
+  it("forwards workspace-scoped media access in direct media sends", async () => {
     sendMessageTelegramMock.mockResolvedValueOnce({ messageId: "tg-media" });
+    const mediaReadFile = vi.fn(async (_filePath: string) => Buffer.from("chart"));
+    const workspaceDir = "/tmp/agent-root";
+    const mediaAccess = { localRoots: [workspaceDir], readFile: mediaReadFile, workspaceDir };
 
     const result = await telegramOutbound.sendMedia!({
       cfg: {} as never,
       to: "12345",
       text: "hello",
-      mediaUrl: "/tmp/image.png",
-      mediaLocalRoots: ["/tmp/agent-root"],
+      mediaUrl: "chart.png",
+      mediaAccess,
+      mediaLocalRoots: mediaAccess.localRoots,
+      mediaReadFile,
       accountId: "ops",
       replyToId: "900",
       threadId: "12",
@@ -95,11 +100,15 @@ describe("telegramOutbound", () => {
       accountId: "ops",
       silent: undefined,
       gatewayClientScopes: undefined,
-      mediaUrl: "/tmp/image.png",
+      mediaUrl: "chart.png",
+      mediaAccess,
       mediaLocalRoots: ["/tmp/agent-root"],
-      mediaReadFile: undefined,
+      mediaReadFile,
       forceDocument: false,
     });
+    expect(lastCallOptions(sendMessageTelegramMock, "12345", "hello").mediaAccess).toBe(
+      mediaAccess,
+    );
     expect(result).toEqual({ channel: "telegram", messageId: "tg-media" });
   });
 
@@ -107,6 +116,7 @@ describe("telegramOutbound", () => {
     sendMessageTelegramMock
       .mockResolvedValueOnce({ messageId: "tg-1", chatId: "12345" })
       .mockResolvedValueOnce({ messageId: "tg-2", chatId: "12345" });
+    const mediaAccess = { localRoots: ["/tmp/media"], workspaceDir: "/tmp/media" };
 
     const result = await telegramOutbound.sendPayload!({
       cfg: {} as never,
@@ -114,7 +124,7 @@ describe("telegramOutbound", () => {
       text: "",
       payload: {
         text: "Approval required",
-        mediaUrls: ["https://example.com/1.jpg", "https://example.com/2.jpg"],
+        mediaUrls: ["chart.png", "chart-2.png"],
         channelData: {
           telegram: {
             quoteText: "quoted",
@@ -123,20 +133,22 @@ describe("telegramOutbound", () => {
               transcriptMessageId: "assistant-media",
               deliverySignature: resolveTelegramPromptContextDeliverySignature({
                 text: "Approval required",
-                mediaUrls: ["https://example.com/1.jpg", "https://example.com/2.jpg"],
+                mediaUrls: ["chart.png", "chart-2.png"],
               }),
             },
           },
         },
       },
-      mediaLocalRoots: ["/tmp/media"],
+      mediaAccess,
+      mediaLocalRoots: mediaAccess.localRoots,
       accountId: "ops",
       deps: { sendTelegram: sendMessageTelegramMock },
     });
 
     expect(sendMessageTelegramMock).toHaveBeenCalledTimes(2);
     const firstOptions = callOptionsAt(sendMessageTelegramMock, 0, "12345", "Approval required");
-    expect(firstOptions.mediaUrl).toBe("https://example.com/1.jpg");
+    expect(firstOptions.mediaUrl).toBe("chart.png");
+    expect(firstOptions.mediaAccess).toBe(mediaAccess);
     expect(firstOptions.mediaLocalRoots).toEqual(["/tmp/media"]);
     expect(firstOptions.quoteText).toBe("quoted");
     expect(firstOptions.buttons).toEqual([
@@ -153,7 +165,8 @@ describe("telegramOutbound", () => {
       finalPart: false,
     });
     const secondOptions = callOptionsAt(sendMessageTelegramMock, 1, "12345", "");
-    expect(secondOptions.mediaUrl).toBe("https://example.com/2.jpg");
+    expect(secondOptions.mediaUrl).toBe("chart-2.png");
+    expect(secondOptions.mediaAccess).toBe(mediaAccess);
     expect(secondOptions.mediaLocalRoots).toEqual(["/tmp/media"]);
     expect(secondOptions.quoteText).toBe("quoted");
     expect(secondOptions.buttons).toBeUndefined();
diff --git a/extensions/telegram/src/outbound-adapter.ts b/extensions/telegram/src/outbound-adapter.ts
index 368e358f9e74..060b86cf9557 100644
--- a/extensions/telegram/src/outbound-adapter.ts
+++ b/extensions/telegram/src/outbound-adapter.ts
@@ -521,6 +521,7 @@ export function createTelegramOutboundAdapter(
         return await send(outboundTo, params.text, {
           ...baseOpts,
           mediaUrl: params.mediaUrl,
+          ...(params.mediaAccess !== undefined ? { mediaAccess: params.mediaAccess } : {}),
           mediaLocalRoots: params.mediaLocalRoots,
           mediaReadFile: params.mediaReadFile,
           forceDocument: params.forceDocument ?? false,
@@ -541,6 +542,7 @@ export function createTelegramOutboundAdapter(
         payload: params.payload,
         baseOpts: {
           ...baseOpts,
+          ...(params.mediaAccess !== undefined ? { mediaAccess: params.mediaAccess } : {}),
           mediaLocalRoots: params.mediaLocalRoots,
           mediaReadFile: params.mediaReadFile,
           forceDocument: params.forceDocument ?? false,
diff --git a/extensions/telegram/src/send-message-types.ts b/extensions/telegram/src/send-message-types.ts
index f58b355404f7..d9e90a547540 100644
--- a/extensions/telegram/src/send-message-types.ts
+++ b/extensions/telegram/src/send-message-types.ts
@@ -1,5 +1,6 @@
 import type { MessageReceipt } from "openclaw/plugin-sdk/channel-outbound";
 import type { MarkdownTableMode, ReplyToMode } from "openclaw/plugin-sdk/config-contracts";
+import type { OutboundMediaAccess } from "openclaw/plugin-sdk/media-runtime";
 import type { RetryConfig } from "openclaw/plugin-sdk/retry-runtime";
 import type { TelegramInlineButtons } from "./button-types.js";
 import type { createTelegramPromptContextProjectionCursor } from "./prompt-context-projection.js";
@@ -12,6 +13,7 @@ export type TelegramSendOpts = {
   accountId?: string;
   verbose?: boolean;
   mediaUrl?: string;
+  mediaAccess?: OutboundMediaAccess;
   mediaLocalRoots?: readonly string[];
   mediaReadFile?: (filePath: string) => Promise<Buffer>;
   gatewayClientScopes?: readonly string[];
diff --git a/extensions/telegram/src/send-message.ts b/extensions/telegram/src/send-message.ts
index 42a49cf733b2..596127b441e8 100644
--- a/extensions/telegram/src/send-message.ts
+++ b/extensions/telegram/src/send-message.ts
@@ -223,6 +223,7 @@ async function sendMessageTelegramWithContext(
       mediaUrl,
       buildOutboundMediaLoadOptions({
         maxBytes: mediaMaxBytes,
+        mediaAccess: opts.mediaAccess,
         mediaLocalRoots: opts.mediaLocalRoots,
         mediaReadFile: opts.mediaReadFile,
         optimizeImages: opts.forceDocument ? false : undefined,
diff --git a/extensions/telegram/src/send.test.ts b/extensions/telegram/src/send.test.ts
index f569324bcc6f..d32b19ecab15 100644
--- a/extensions/telegram/src/send.test.ts
+++ b/extensions/telegram/src/send.test.ts
@@ -3803,6 +3803,10 @@ describe("sendMessageTelegram", () => {
 
   it("defaults outbound media uploads to 100MB", async () => {
     const chatId = "123";
+    const mediaAccess = {
+      localRoots: ["/tmp/agent-root"],
+      workspaceDir: "/tmp/agent-root",
+    };
     const sendPhoto = vi.fn().mockResolvedValue({
       message_id: 60,
       chat: { id: chatId },
@@ -3821,15 +3825,19 @@ describe("sendMessageTelegram", () => {
       cfg: TELEGRAM_TEST_CFG,
       token: "tok",
       api,
-      mediaUrl: "https://example.com/photo.jpg",
+      mediaUrl: "chart.png",
+      mediaAccess,
     });
 
     const [mediaUrl, options] = requireMockCall(
       firstMockCall(loadWebMedia, "loadWebMedia call"),
       "load web media call",
     );
-    expect(mediaUrl).toBe("https://example.com/photo.jpg");
-    expect(requireRecord(options, "load web media options").maxBytes).toBe(100 * 1024 * 1024);
+    expect(mediaUrl).toBe("chart.png");
+    const loadOptions = requireRecord(options, "load web media options");
+    expect(loadOptions.maxBytes).toBe(100 * 1024 * 1024);
+    expect(loadOptions.localRoots).toEqual(mediaAccess.localRoots);
+    expect(loadOptions.workspaceDir).toBe(mediaAccess.workspaceDir);
   });
 
   it("uses configured telegram mediaMaxMb for outbound uploads", async () => {
diff --git a/qa/scenarios/channels/channel-workspace-relative-media.yaml b/qa/scenarios/channels/channel-workspace-relative-media.yaml
new file mode 100644
index 000000000000..a74a383f6b85
--- /dev/null
+++ b/qa/scenarios/channels/channel-workspace-relative-media.yaml
@@ -0,0 +1,110 @@
+title: Channel sends preserve workspace-relative media authority
+
+scenario:
+  id: channel-workspace-relative-media
+  surface: channels
+  coverage:
+    primary:
+      - channels.outbound-direct-text-media-sends
+    secondary:
+      - channels.media-roots
+  objective: Deliver a workspace-relative image through direct Gateway and plugin-action sends.
+  execution:
+    kind: flow
+    channels:
+      - matrix
+      - telegram
+    timeoutMs: 90000
+
+flow:
+  steps:
+    - name: delivers workspace-relative images through direct and plugin-action sends
+      actions:
+        - call: waitForGatewayHealthy
+          args: [{ ref: env }, 60000]
+        - call: waitForTransportReady
+          args: [{ ref: env }, 60000]
+        - set: marker
+          value:
+            expr: "`QA-WORKSPACE-RELATIVE-MEDIA-${randomUUID()}`"
+        - set: filename
+          value:
+            expr: "`${marker}.png`"
+        - set: fixturePath
+          value:
+            expr: "path.join(env.gateway.workspaceDir, filename)"
+        - set: delivery
+          value:
+            expr: "transport.buildAgentDelivery({ target: 'group:main' })"
+        - set: outboundStartIndex
+          value:
+            expr: "state.getSnapshot().messages.filter((message) => message.direction === 'outbound').length"
+        - set: matrixRecordIndex
+          value:
+            expr: "transport.id === 'matrix' ? scenarioContext.faultProxyObserver.records().length : 0"
+        - try:
+            actions:
+              - call: fs.writeFile
+                args:
+                  - ref: fixturePath
+                  - expr: "Buffer.from(imageUnderstandingValidPngBase64, 'base64')"
+              - call: env.gateway.call
+                saveAs: sent
+                args:
+                  - send
+                  - channel: { expr: delivery.channel }
+                    to: { expr: delivery.to }
+                    accountId: { expr: transport.accountId }
+                    agentId: qa
+                    message: { ref: marker }
+                    mediaUrl: { expr: "`./${filename}`" }
+                    idempotencyKey: { expr: randomUUID() }
+                  - timeoutMs: 60000
+              - assert:
+                  expr: "Boolean(sent?.messageId) && sent.channel === delivery.channel"
+                  message: Gateway did not return a successful channel delivery receipt
+              - waitForOutbound:
+                  textIncludes: { ref: marker }
+                  sinceIndex: { ref: outboundStartIndex }
+                  timeoutMs: 60000
+                saveAs: outbound
+              - assert:
+                  expr: "state.getSnapshot().messages.filter((message) => message.accountId === transport.accountId && message.direction === 'outbound' && message.text === marker).length === 1"
+                  message: workspace-relative image caption was not delivered exactly once
+              - call: env.gateway.call
+                saveAs: actionSent
+                args:
+                  - message.action
+                  - channel: { expr: delivery.channel }
+                    action: send
+                    accountId: { expr: transport.accountId }
+                    agentId: qa
+                    idempotencyKey: { expr: randomUUID() }
+                    params:
+                      to: { expr: delivery.to }
+                      message: { expr: "`${marker}-ACTION`" }
+                      media: { expr: "`./${filename}`" }
+                  - timeoutMs: 60000
+              - assert:
+                  expr: "actionSent?.ok === true && Boolean(actionSent.messageId ?? actionSent.result?.messageId)"
+                  message: channel plugin action did not return a successful delivery receipt
+              - waitForOutbound:
+                  textIncludes: { expr: "`${marker}-ACTION`" }
+                  sinceIndex: { ref: outboundStartIndex }
+                  timeoutMs: 60000
+                saveAs: actionOutbound
+              - assert:
+                  expr: "state.getSnapshot().messages.filter((message) => message.accountId === transport.accountId && message.direction === 'outbound' && message.text === `${marker}-ACTION`).length === 1"
+                  message: plugin-action image caption was not delivered exactly once
+              - if:
+                  expr: "transport.id === 'matrix'"
+                  then:
+                    - assert:
+                        expr: "[marker, `${marker}-ACTION`].every((caption) => scenarioContext.observedEvents.some((event) => event.roomId === delivery.to && event.sender === scenarioContext.sutUserId && event.body === caption && event.msgtype === 'm.image')) && scenarioContext.faultProxyObserver.records().slice(matrixRecordIndex).filter((record) => record.request.method === 'POST' && record.request.route.includes('/media/') && record.request.route.endsWith('/upload') && record.response.status >= 200 && record.response.status < 300).length >= 2"
+                        message: Matrix did not upload and deliver both native image events
+            finally:
+              - call: fs.rm
+                args:
+                  - ref: fixturePath
+                  - force: true
+      detailsExpr: "JSON.stringify({ channel: delivery.channel, relativeMediaUrl: `./${filename}`, messageId: sent.messageId, outboundId: outbound.id, actionMessageId: actionSent.messageId ?? actionSent.result?.messageId, actionOutboundId: actionOutbound.id, nativeImagesVerified: transport.id === 'matrix' })"
diff --git a/src/gateway/server-methods/send.test.ts b/src/gateway/server-methods/send.test.ts
index d8befe7f5024..d699b5a5cf2c 100644
--- a/src/gateway/server-methods/send.test.ts
+++ b/src/gateway/server-methods/send.test.ts
@@ -140,6 +140,7 @@ vi.mock("../../agents/agent-scope.js", () => ({
     config?: unknown;
     agentId?: string;
   }) => resolveAgentIdFromSessionKeyForTests({ sessionKey }),
+  resolveAgentConfig: () => undefined,
   resolveDefaultAgentId: () => "main",
   resolveAgentWorkspaceDir: () => TEST_AGENT_WORKSPACE,
 }));
@@ -3898,9 +3899,87 @@ describe("gateway send mirroring", () => {
     expect(firstRespondCall(respond)[0]).toBe(true);
     const actionCall = lastDispatchChannelMessageActionCall();
     expect(actionCall?.mediaLocalRoots).toContain(TEST_AGENT_WORKSPACE);
+    expect(actionCall).not.toHaveProperty("mediaAccess");
+    expect(actionCall).not.toHaveProperty("mediaReadFile");
     expect(actionCall?.gatewayClientScopes).toEqual(["operator.write"]);
   });
 
+  it("passes reader-free workspace media access only to gateway send actions", async () => {
+    registerMessageActionPlugin({ registrySuffix: "message-action-workspace-media-access" });
+
+    const { respond } = await runMessageActionRequest(
+      {
+        channel: "telegram",
+        action: "send",
+        params: { to: "123", message: "chart", mediaUrl: "chart.png" },
+        agentId: "work",
+        idempotencyKey: "idem-message-action-workspace-media-access",
+      },
+      { connect: { scopes: ["operator.write"] } },
+    );
+
+    expect(firstRespondCall(respond)[0]).toBe(true);
+    const actionCall = lastDispatchChannelMessageActionCall();
+    expect(actionCall?.mediaAccess).toMatchObject({
+      localRoots: expect.arrayContaining([TEST_AGENT_WORKSPACE]),
+      workspaceDir: TEST_AGENT_WORKSPACE,
+    });
+    expect(actionCall?.mediaAccess.localRoots).toBe(actionCall?.mediaLocalRoots);
+    expect(actionCall?.mediaAccess).not.toHaveProperty("readFile");
+    expect(actionCall).not.toHaveProperty("mediaReadFile");
+  });
+
+  it("uses signed sender group policy without granting gateway send host reads", async () => {
+    const plugin = registerMessageActionPlugin({
+      chatType: "group",
+      registrySuffix: "message-action-signed-sender-media-policy",
+    });
+    const resolveToolPolicy = vi.fn(({ senderId }: { senderId?: string | null }) =>
+      senderId === "blocked-sender" ? { deny: ["read"] } : undefined,
+    );
+    plugin.groups = { resolveToolPolicy };
+    const sessionKey = "agent:work:telegram:group:ops";
+
+    const { respond } = await runMessageActionRequest(
+      {
+        channel: "telegram",
+        action: "send",
+        params: { to: "ops", message: "chart", mediaUrl: "chart.png" },
+        requesterSenderId: "forged-allowed-sender",
+        sessionKey,
+        agentId: "work",
+        idempotencyKey: "idem-message-action-signed-sender-media-policy",
+      },
+      {
+        internal: {
+          agentRuntimeIdentity: {
+            kind: "agentRuntime",
+            agentId: "work",
+            sessionKey,
+            messageActionContext: {
+              expiresAtMs: Date.now() + 60_000,
+              requesterSenderId: "blocked-sender",
+            },
+          },
+        },
+      },
+      {
+        ...makeContext(),
+        getRuntimeConfig: () => ({ tools: { allow: ["read"] } }),
+      } as GatewayRequestContext,
+    );
+
+    expect(firstRespondCall(respond)[0]).toBe(true);
+    expect(resolveToolPolicy).toHaveBeenCalledWith(
+      expect.objectContaining({ groupId: "ops", senderId: "blocked-sender" }),
+    );
+    const actionCall = lastDispatchChannelMessageActionCall();
+    expect(actionCall?.requesterSenderId).toBe("blocked-sender");
+    expect(actionCall?.mediaAccess.workspaceDir).toBe(TEST_AGENT_WORKSPACE);
+    expect(actionCall?.mediaAccess).not.toHaveProperty("readFile");
+    expect(actionCall).not.toHaveProperty("mediaReadFile");
+  });
+
   it("materializes buffer-only message.action sends on the gateway before plugin dispatch", async () => {
     registerMessageActionPlugin({ registrySuffix: "message-action-buffer-materialize" });
 
diff --git a/src/gateway/server-methods/send.ts b/src/gateway/server-methods/send.ts
index 0670f4a3ca21..7e043146e6f2 100644
--- a/src/gateway/server-methods/send.ts
+++ b/src/gateway/server-methods/send.ts
@@ -55,6 +55,7 @@ import {
 import { maybeResolveIdLikeTarget } from "../../infra/outbound/target-resolver.js";
 import { resolveOutboundTarget } from "../../infra/outbound/targets.js";
 import { getAgentScopedMediaLocalRoots } from "../../media/local-roots.js";
+import { resolveAgentScopedOutboundMediaAccess } from "../../media/read-capability.js";
 import { KeyedAsyncQueue } from "../../plugin-sdk/keyed-async-queue.js";
 import { extractToolPayload } from "../../plugin-sdk/tool-payload.js";
 import { normalizePollInput } from "../../polls.js";
@@ -956,6 +957,29 @@ export const sendHandlers: GatewayRequestHandlers = {
           if (accountId) {
             request.params.accountId = accountId;
           }
+          const resolvedMediaAccess =
+            request.action === "send"
+              ? resolveAgentScopedOutboundMediaAccess({
+                  cfg,
+                  agentId,
+                  sessionKey,
+                  messageProvider: sessionKey ? undefined : channel,
+                  accountId: sessionKey
+                    ? (trustedContext.requesterAccountId ?? accountId)
+                    : accountId,
+                  requesterSenderId: trustedContext.requesterSenderId,
+                })
+              : undefined;
+          // Gateway identities omit trusted sender aliases; expose roots/workspace
+          // only so a host reader cannot bypass alias-based group read policy.
+          const mediaAccess = resolvedMediaAccess
+            ? {
+                localRoots: resolvedMediaAccess.localRoots,
+                ...(resolvedMediaAccess.workspaceDir
+                  ? { workspaceDir: resolvedMediaAccess.workspaceDir }
+                  : {}),
+              }
+            : undefined;
           if (request.action === "send") {
             await hydrateAttachmentParamsForAction({
               cfg,
@@ -1006,7 +1030,9 @@ export const sendHandlers: GatewayRequestHandlers = {
             sessionId: normalizeOptionalString(request.sessionId) ?? undefined,
             inboundEventKind: request.inboundTurnKind,
             agentId,
-            mediaLocalRoots: getAgentScopedMediaLocalRoots(cfg, agentId),
+            ...(mediaAccess
+              ? { mediaAccess, mediaLocalRoots: mediaAccess.localRoots }
+              : { mediaLocalRoots: getAgentScopedMediaLocalRoots(cfg, agentId) }),
             toolContext: trustedContext.toolContext,
             dryRun: false,
             gatewayClientScopes,