diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f6415911943..798cafe0cb30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,6 +60,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- **Control UI operator session permissions:** honor Gateway-advertised operator scopes for new-thread creation, thread management, checkpoints, and sharing controls while preserving read-only navigation and legacy Gateway compatibility. Fixes #117786. Thanks @shakkernerd.
 - **Control UI archived session deletion:** send archive-gated delete requests from Sessions-page row and mixed-selection actions so write-scoped operators can remove archived threads while active-session deletion remains admin-only. Thanks @shakkernerd.
 - **Control UI command recovery:** keep delayed detached and immediate command failures scoped to their submitting session, preserving failed drafts and attachments for that pane without overwriting the active session. Fixes #116846. Thanks @shakkernerd.
 - **Microsoft Teams message-tool replies:** keep automatic live previews from duplicating a message already delivered to the current Teams conversation, while preserving distinct follow-up text and cross-conversation sends. Fixes #116397. (#116398) Thanks @a-tokyo.
diff --git a/ui/src/e2e/session-ownership.e2e.test.ts b/ui/src/e2e/session-ownership.e2e.test.ts
index 0af36dd22958..7e12249a7578 100644
--- a/ui/src/e2e/session-ownership.e2e.test.ts
+++ b/ui/src/e2e/session-ownership.e2e.test.ts
@@ -198,6 +198,7 @@ describeControlUiE2e("Control UI session ownership", () => {
     page = currentPage;
     await installMockGateway(currentPage, {
       sessionKey: "agent:main:ada",
+      featureMethods: ["chat.metadata", "chat.startup", "sessions.create"],
       historyMessages: [{ role: "assistant", content: [{ type: "text", text: "Ready." }] }],
       methodResponses: { "sessions.list": sessionsList(["profile-ada", "profile-ada"]) },
     });
@@ -279,6 +280,7 @@ describeControlUiE2e("Control UI session ownership", () => {
     page = currentPage;
     const gateway = await installMockGateway(currentPage, {
       allowedSessionVisibilities: ["shared", "draft"],
+      featureMethods: ["chat.metadata", "chat.startup", "sessions.create"],
       hasMultipleSessionSharingIdentities: true,
       methodResponses: {
         "sessions.list": sessionsList(["profile-ada", "profile-bob"]),
@@ -324,7 +326,15 @@ describeControlUiE2e("Control UI session ownership", () => {
     Object.assign(ownerSession, { sharingRole: "owner" });
     const gateway = await installMockGateway(currentPage, {
       sessionKey: "agent:main:ada",
-      featureMethods: ["chat.metadata", "chat.startup", "session.visibility.set"],
+      featureMethods: [
+        "chat.metadata",
+        "chat.startup",
+        "session.visibility.set",
+        "session.members.list",
+        "session.members.add",
+        "session.members.remove",
+      ],
+      operatorScopes: ["operator.write"],
       historyMessages: [{ role: "assistant", content: [{ type: "text", text: "Ready." }] }],
       methodResponses: {
         "sessions.list": sessions,
@@ -359,6 +369,66 @@ describeControlUiE2e("Control UI session ownership", () => {
     expect(await gateway.getRequests("session.visibility.set")).toHaveLength(1);
   });
 
+  it("lets a read-scoped owner inspect sharing but blocks mutations", async () => {
+    const context = await browser.newContext({ viewport: { height: 800, width: 1200 } });
+    const currentPage = await context.newPage();
+    page = currentPage;
+    const sessions = draftSessionsList();
+    const ownerSession = sessions.sessions[0];
+    if (!ownerSession) {
+      throw new Error("expected owner draft fixture");
+    }
+    Object.assign(ownerSession, { sharingRole: "owner" });
+    const gateway = await installMockGateway(currentPage, {
+      sessionKey: "agent:main:ada",
+      featureMethods: [
+        "chat.metadata",
+        "chat.startup",
+        "session.visibility.set",
+        "session.members.list",
+        "session.members.add",
+        "session.members.remove",
+      ],
+      operatorScopes: ["operator.read"],
+      historyMessages: [{ role: "assistant", content: [{ type: "text", text: "Ready." }] }],
+      methodResponses: {
+        "sessions.list": sessions,
+        "session.members.list": {
+          sessionKey: "agent:main:ada",
+          members: [],
+          identities: [{ type: "human", id: "profile-bob", label: "Bob" }],
+          role: "owner",
+          allowedVisibilities: ["shared", "draft"],
+        },
+      },
+    });
+
+    await currentPage.goto(`${server?.baseUrl ?? ""}chat`);
+    await currentPage.getByText("Ready.", { exact: true }).waitFor();
+    await currentPage.getByLabel("Thread sharing").click();
+    await gateway.waitForRequest("session.members.list");
+    const dropdown = currentPage.locator(".chat-pane__sharing-menu");
+    const publish = dropdown.locator('wa-dropdown-item[value="visibility:shared"]');
+    await publish.waitFor();
+    expect(await publish.getAttribute("disabled")).not.toBeNull();
+
+    await dropdown.evaluate((element) => {
+      element.dispatchEvent(
+        new CustomEvent("wa-select", {
+          detail: { item: { value: "visibility:shared" } },
+        }),
+      );
+      element.dispatchEvent(
+        new CustomEvent("wa-select", {
+          detail: { item: { value: "member:profile-bob" } },
+        }),
+      );
+    });
+
+    expect(await gateway.getRequests("session.visibility.set")).toHaveLength(0);
+    expect(await gateway.getRequests("session.members.add")).toHaveLength(0);
+  });
+
   it("clears a selected draft mode when sharing policy becomes unavailable", async () => {
     const context = await browser.newContext({ viewport: { height: 800, width: 1200 } });
     const currentPage = await context.newPage();
diff --git a/ui/src/i18n/locales/en.ts b/ui/src/i18n/locales/en.ts
index df060c7f34f9..5b67486d5fa6 100644
--- a/ui/src/i18n/locales/en.ts
+++ b/ui/src/i18n/locales/en.ts
@@ -667,6 +667,7 @@ export const en: TranslationMap = {
     automationPrefix: "Automation:",
     actionRequiresConnection: "Connect to the Gateway to change threads.",
     actionUnavailable: "This Gateway does not support this thread action.",
+    actionRequiresRead: "This action requires operator.read access.",
     actionRequiresWrite: "This action requires operator.write access.",
     actionRequiresAdmin: "This action requires operator.admin access.",
     deletePreservedWorktrees:
diff --git a/ui/src/lib/session-method-access.test.ts b/ui/src/lib/session-method-access.test.ts
index 25d571db2314..178f63a88632 100644
--- a/ui/src/lib/session-method-access.test.ts
+++ b/ui/src/lib/session-method-access.test.ts
@@ -52,6 +52,30 @@ describe("readSessionMethodAccess", () => {
     ).toBe(true);
   });
 
+  it("allows read, write, and admin scopes to satisfy read-scoped actions", () => {
+    for (const scope of ["operator.read", "operator.write", "operator.admin"]) {
+      expect(
+        readSessionMethodAccess(snapshot({ methods: ["session.members.list"], scopes: [scope] }), {
+          method: "session.members.list",
+          requiredScope: "operator.read",
+        }).allowed,
+      ).toBe(true);
+    }
+  });
+
+  it("rejects a read-scoped action without a compatible operator scope", () => {
+    expect(
+      readSessionMethodAccess(
+        snapshot({ methods: ["session.members.list"], scopes: ["operator.approvals"] }),
+        { method: "session.members.list", requiredScope: "operator.read" },
+      ),
+    ).toMatchObject({
+      allowed: false,
+      cause: "missing-scope",
+      requiredScope: "operator.read",
+    });
+  });
+
   it("preserves legacy snapshots without advertised auth scopes", () => {
     expect(
       readSessionMethodAccess(snapshot({ includeAuth: false }), {
diff --git a/ui/src/lib/session-method-access.ts b/ui/src/lib/session-method-access.ts
index 13df57290d48..767435dd8cc1 100644
--- a/ui/src/lib/session-method-access.ts
+++ b/ui/src/lib/session-method-access.ts
@@ -7,11 +7,13 @@ import type { ApplicationGatewaySnapshot } from "../app/gateway.ts";
 import { t } from "../i18n/index.ts";
 import { isGatewayMethodAdvertised } from "./gateway-methods.ts";
 
+export type SessionMethodOperatorScope = "operator.read" | SessionMutationOperatorScope;
+
 export type SessionMethodAccess =
-  | { allowed: true; requiredScope: SessionMutationOperatorScope }
+  | { allowed: true; requiredScope: SessionMethodOperatorScope }
   | {
       allowed: false;
-      requiredScope: SessionMutationOperatorScope;
+      requiredScope: SessionMethodOperatorScope;
       reason: string;
       cause: "disconnected" | "method-unavailable" | "missing-scope";
     };
@@ -19,12 +21,12 @@ export type SessionMethodAccess =
 type SessionMethodAccessRequest = {
   method: string;
   params?: unknown;
-  requiredScope?: SessionMutationOperatorScope;
+  requiredScope?: SessionMethodOperatorScope;
 };
 
 function sessionMethodAccessReason(
   cause: Exclude<SessionMethodAccess, { allowed: true }>["cause"],
-  requiredScope: SessionMutationOperatorScope,
+  requiredScope: SessionMethodOperatorScope,
 ): string {
   if (cause === "disconnected") {
     return t("sessionsView.actionRequiresConnection");
@@ -35,7 +37,9 @@ function sessionMethodAccessReason(
   return t(
     requiredScope === "operator.admin"
       ? "sessionsView.actionRequiresAdmin"
-      : "sessionsView.actionRequiresWrite",
+      : requiredScope === "operator.write"
+        ? "sessionsView.actionRequiresWrite"
+        : "sessionsView.actionRequiresRead",
   );
 }
 
diff --git a/ui/src/pages/chat/chat-pane-header.ts b/ui/src/pages/chat/chat-pane-header.ts
index d7d6a431652a..edbb670ee089 100644
--- a/ui/src/pages/chat/chat-pane-header.ts
+++ b/ui/src/pages/chat/chat-pane-header.ts
@@ -17,6 +17,7 @@ import { hasSessionPresenceViewers } from "../../components/viewer-facepile.ts";
 import { t } from "../../i18n/index.ts";
 import { copyToClipboard } from "../../lib/clipboard.ts";
 import { isGatewayMethodAdvertised } from "../../lib/gateway-methods.ts";
+import { readSessionMethodAccess } from "../../lib/session-method-access.ts";
 import { parseAgentSessionKey } from "../../lib/sessions/session-key.ts";
 import { renderBoardDockMenu, renderBoardFaceToggle } from "./board-session-surface.ts";
 import { ChatPaneContext } from "./chat-pane-context.ts";
@@ -100,6 +101,29 @@ export abstract class ChatPaneHeader extends ChatPaneContext {
       : branchSwitchWorking
         ? t("chat.sessionHeader.branchSwitchUnavailable")
         : null;
+    const sharingSnapshot = this.context.gateway.snapshot;
+    const sharingMethodsSupported = [
+      "session.visibility.set",
+      "session.members.list",
+      "session.members.add",
+      "session.members.remove",
+    ].some((method) => isGatewayMethodAdvertised(sharingSnapshot, method) !== false);
+    const sharingReadAccess = readSessionMethodAccess(sharingSnapshot, {
+      method: "session.members.list",
+      requiredScope: "operator.read",
+    });
+    const sharingVisibilityAccess = readSessionMethodAccess(sharingSnapshot, {
+      method: "session.visibility.set",
+      requiredScope: "operator.write",
+    });
+    const sharingMemberAddAccess = readSessionMethodAccess(sharingSnapshot, {
+      method: "session.members.add",
+      requiredScope: "operator.write",
+    });
+    const sharingMemberRemoveAccess = readSessionMethodAccess(sharingSnapshot, {
+      method: "session.members.remove",
+      requiredScope: "operator.write",
+    });
     return renderChatPaneHeader({
       paneId: this.paneId,
       narrow: this.narrow,
@@ -156,20 +180,29 @@ export abstract class ChatPaneHeader extends ChatPaneContext {
         this.syncChatSidebarForDock(face === "dashboard" ? board.dock : "hidden");
         this.persistBoardSessionView({ face });
       }),
-      sharingControl:
-        isGatewayMethodAdvertised(this.context.gateway.snapshot, "session.visibility.set") === true
-          ? renderChatSessionSharing({
-              session: row,
-              state: row
-                ? this.sessionSharingStates.get(this.sessionSharingCacheKey(row.key))
-                : undefined,
-              onOpen: () => row && void this.loadSessionSharing(row),
-              onVisibilityChange: (visibility) =>
-                row && void this.setSessionVisibility(row, visibility),
-              onMemberChange: (identityId, member) =>
-                row && void this.setSessionMember(row, identityId, member),
-            })
-          : nothing,
+      sharingControl: sharingMethodsSupported
+        ? renderChatSessionSharing({
+            session: row,
+            state: row
+              ? this.sessionSharingStates.get(this.sessionSharingCacheKey(row.key))
+              : undefined,
+            openDisabledReason: sharingReadAccess.allowed ? undefined : sharingReadAccess.reason,
+            visibilityDisabledReason: sharingVisibilityAccess.allowed
+              ? undefined
+              : sharingVisibilityAccess.reason,
+            memberAddDisabledReason: sharingMemberAddAccess.allowed
+              ? undefined
+              : sharingMemberAddAccess.reason,
+            memberRemoveDisabledReason: sharingMemberRemoveAccess.allowed
+              ? undefined
+              : sharingMemberRemoveAccess.reason,
+            onOpen: () => row && void this.loadSessionSharing(row),
+            onVisibilityChange: (visibility) =>
+              row && void this.setSessionVisibility(row, visibility),
+            onMemberChange: (identityId, member) =>
+              row && void this.setSessionMember(row, identityId, member),
+          })
+        : nothing,
       boardDockAction: renderBoardDockMenu(
         board.hasBoard && !board.activeTabReadOnly && board.provider.canMutate,
         board.face,
diff --git a/ui/src/pages/chat/chat-pane-sharing.test.ts b/ui/src/pages/chat/chat-pane-sharing.test.ts
index 75c083cc65ea..55fafb05996b 100644
--- a/ui/src/pages/chat/chat-pane-sharing.test.ts
+++ b/ui/src/pages/chat/chat-pane-sharing.test.ts
@@ -18,12 +18,49 @@ import type { ChatPageHost } from "./chat-state-host.ts";
 import type { ChatSessionSharingState } from "./components/chat-session-sharing.ts";
 
 type SharingPane = TestChatPane & {
+  loadSessionSharing: (row: GatewaySessionRow, force?: boolean) => Promise<void>;
   sessionSharingCacheKey: (sessionKey: string) => string;
   sessionSharingStates: Map<string, ChatSessionSharingState>;
   setSessionMember: (row: GatewaySessionRow, identityId: string, member: boolean) => Promise<void>;
   setSessionVisibility: (row: GatewaySessionRow, visibility: SessionVisibility) => Promise<void>;
 };
 
+const SHARING_METHODS = [
+  "session.visibility.set",
+  "session.members.list",
+  "session.members.add",
+  "session.members.remove",
+];
+
+function setSharingAuthorization(
+  pane: SharingPane,
+  params: {
+    methods?: string[];
+    phase?: "connected" | "reconnecting";
+    scopes?: string[];
+  } = {},
+): void {
+  const snapshot = pane.context.gateway.snapshot;
+  snapshot.phase = params.phase ?? "connected";
+  snapshot.hello = {
+    ...snapshot.hello,
+    auth: {
+      role: "operator",
+      scopes: params.scopes ?? ["operator.admin"],
+    },
+    features: {
+      ...snapshot.hello?.features,
+      methods: params.methods ?? SHARING_METHODS,
+    },
+  } as typeof snapshot.hello;
+}
+
+function createSharingTestChatPane(params: Parameters<typeof createTestChatPane>[0]) {
+  const result = createTestChatPane(params);
+  setSharingAuthorization(result.pane as SharingPane);
+  return result;
+}
+
 type Deferred<T> = {
   promise: Promise<T>;
   reject: (error: unknown) => void;
@@ -68,6 +105,7 @@ function replaceConnection(
 ): void {
   pane.connectionGeneration += 1;
   pane.context = createSessionContext(client, sessions);
+  setSharingAuthorization(pane);
   pane.state = state;
   state.client = client;
   state.connected = true;
@@ -108,6 +146,126 @@ const mutations = [
   },
 ] as const;
 
+describe("chat pane sharing authorization", () => {
+  it("allows read-scoped owners to load sharing data but not mutate it", async () => {
+    const row = sessionRow();
+    const request = vi.fn(async (method: string) => {
+      if (method === "session.members.list") {
+        return sharingResult(row);
+      }
+      throw new Error(`unexpected request: ${method}`);
+    });
+    const sessions = {
+      refreshReplacement: vi.fn(),
+    } as unknown as SessionCapability;
+    const { pane: testPane } = createSharingTestChatPane({
+      client: { request } as unknown as GatewayBrowserClient,
+      sessions,
+    });
+    const pane = testPane as SharingPane;
+    setSharingAuthorization(pane, { scopes: ["operator.read"] });
+
+    await pane.loadSessionSharing(row);
+    await pane.setSessionVisibility(row, "shared");
+    await pane.setSessionMember(row, "identity-alice", true);
+
+    expect(request).toHaveBeenCalledTimes(1);
+    expect(request).toHaveBeenCalledWith(
+      "session.members.list",
+      expect.objectContaining({ sessionKey: row.key }),
+    );
+    expect(sessions.refreshReplacement).not.toHaveBeenCalled();
+  });
+
+  it("allows write and admin scoped owners to mutate sharing", async () => {
+    for (const scope of ["operator.write", "operator.admin"]) {
+      const row = sessionRow();
+      const request = vi.fn(async (method: string) => {
+        if (method === "session.members.list") {
+          return sharingResult(row);
+        }
+        return {};
+      });
+      const sessions = {
+        refreshReplacement: vi.fn(async () => undefined),
+      } as unknown as SessionCapability;
+      const { pane: testPane } = createSharingTestChatPane({
+        client: { request } as unknown as GatewayBrowserClient,
+        sessions,
+      });
+      const pane = testPane as SharingPane;
+      setSharingAuthorization(pane, { scopes: [scope] });
+
+      await pane.setSessionVisibility(row, "shared");
+      await pane.setSessionMember(row, "identity-alice", true);
+
+      expect(request).toHaveBeenCalledWith(
+        "session.visibility.set",
+        expect.objectContaining({ sessionKey: row.key }),
+      );
+      expect(request).toHaveBeenCalledWith(
+        "session.members.add",
+        expect.objectContaining({ sessionKey: row.key }),
+      );
+    }
+  });
+
+  it("refuses sharing requests for non-managers and disconnected snapshots", async () => {
+    for (const authorization of [
+      { row: { ...sessionRow(), sharingRole: "member" as const } },
+      { row: sessionRow(), phase: "reconnecting" as const },
+    ]) {
+      const request = vi.fn();
+      const sessions = {
+        refreshReplacement: vi.fn(),
+      } as unknown as SessionCapability;
+      const { pane: testPane } = createSharingTestChatPane({
+        client: { request } as unknown as GatewayBrowserClient,
+        sessions,
+      });
+      const pane = testPane as SharingPane;
+      setSharingAuthorization(pane, {
+        phase: authorization.phase,
+        scopes: ["operator.admin"],
+      });
+
+      await pane.loadSessionSharing(authorization.row);
+      await pane.setSessionVisibility(authorization.row, "shared");
+      await pane.setSessionMember(authorization.row, "identity-alice", true);
+
+      expect(request).not.toHaveBeenCalled();
+      expect(sessions.refreshReplacement).not.toHaveBeenCalled();
+    }
+  });
+
+  it("refuses explicitly unadvertised sharing methods", async () => {
+    const row = sessionRow();
+    const request = vi.fn(async () => sharingResult(row));
+    const sessions = {
+      refreshReplacement: vi.fn(),
+    } as unknown as SessionCapability;
+    const { pane: testPane } = createSharingTestChatPane({
+      client: { request } as unknown as GatewayBrowserClient,
+      sessions,
+    });
+    const pane = testPane as SharingPane;
+    setSharingAuthorization(pane, {
+      methods: ["session.members.list"],
+      scopes: ["operator.admin"],
+    });
+
+    await pane.loadSessionSharing(row);
+    await pane.setSessionVisibility(row, "shared");
+    await pane.setSessionMember(row, "identity-alice", true);
+
+    expect(request).toHaveBeenCalledTimes(1);
+    expect(request).toHaveBeenCalledWith(
+      "session.members.list",
+      expect.objectContaining({ sessionKey: row.key }),
+    );
+  });
+});
+
 describe.each(mutations)("chat pane $name mutation connection ownership", (mutation) => {
   it.each(["resolve", "reject"] as const)(
     "drops a stale mutation when the previous connection later %s",
@@ -122,7 +280,7 @@ describe.each(mutations)("chat pane $name mutation connection ownership", (mutat
       const oldSessions = {
         refreshReplacement: vi.fn(),
       } as unknown as SessionCapability;
-      const { pane: testPane, state } = createTestChatPane({
+      const { pane: testPane, state } = createSharingTestChatPane({
         client: { request: oldRequest } as unknown as GatewayBrowserClient,
         sessions: oldSessions,
       });
@@ -159,7 +317,7 @@ describe.each(mutations)("chat pane $name mutation connection ownership", (mutat
     const sessions = {
       refreshReplacement: vi.fn(),
     } as unknown as SessionCapability;
-    const { pane: testPane } = createTestChatPane({
+    const { pane: testPane } = createSharingTestChatPane({
       client: { request } as unknown as GatewayBrowserClient,
       sessions,
     });
@@ -190,7 +348,7 @@ describe("chat pane sharing mutation phase ownership", () => {
       const oldSessions = {
         refreshReplacement: vi.fn(() => refreshed.promise),
       } as unknown as SessionCapability;
-      const { pane: testPane, state } = createTestChatPane({
+      const { pane: testPane, state } = createSharingTestChatPane({
         client: { request } as unknown as GatewayBrowserClient,
         sessions: oldSessions,
       });
@@ -232,7 +390,7 @@ describe("chat pane sharing mutation phase ownership", () => {
         const oldSessions = {
           refreshReplacement: vi.fn(async () => undefined),
         } as unknown as SessionCapability;
-        const { pane: testPane, state } = createTestChatPane({
+        const { pane: testPane, state } = createSharingTestChatPane({
           client: { request } as unknown as GatewayBrowserClient,
           sessions: oldSessions,
         });
@@ -277,7 +435,7 @@ describe("chat pane sharing mutation phase ownership", () => {
     const oldSessions = {
       refreshReplacement: vi.fn(() => refreshed.promise),
     } as unknown as SessionCapability;
-    const { pane: testPane, state } = createTestChatPane({
+    const { pane: testPane, state } = createSharingTestChatPane({
       client: { request } as unknown as GatewayBrowserClient,
       sessions: oldSessions,
     });
@@ -313,7 +471,7 @@ describe("chat pane current sharing mutation refresh order", () => {
         calls.push("sessions.refreshReplacement");
       }),
     } as unknown as SessionCapability;
-    const { pane: testPane } = createTestChatPane({
+    const { pane: testPane } = createSharingTestChatPane({
       client: { request } as unknown as GatewayBrowserClient,
       sessions,
     });
@@ -346,7 +504,7 @@ describe("chat pane current sharing mutation refresh order", () => {
         calls.push("sessions.refreshReplacement");
       }),
     } as unknown as SessionCapability;
-    const { pane: testPane } = createTestChatPane({
+    const { pane: testPane } = createSharingTestChatPane({
       client: { request } as unknown as GatewayBrowserClient,
       sessions,
     });
diff --git a/ui/src/pages/chat/chat-pane-sharing.ts b/ui/src/pages/chat/chat-pane-sharing.ts
index f250b201440c..f3c7df683d2e 100644
--- a/ui/src/pages/chat/chat-pane-sharing.ts
+++ b/ui/src/pages/chat/chat-pane-sharing.ts
@@ -15,6 +15,7 @@ import type {
 import { hasMultiplePresenceIdentities } from "../../components/viewer-facepile.ts";
 import { t } from "../../i18n/index.ts";
 import { isGatewayMethodAdvertised } from "../../lib/gateway-methods.ts";
+import { readSessionMethodAccess } from "../../lib/session-method-access.ts";
 import { scopedAgentParamsForSession } from "../../lib/sessions/index.ts";
 import {
   areUiSessionKeysEquivalent,
@@ -28,7 +29,10 @@ import {
 } from "./chat-pane-shared.ts";
 import type { ChatPageHost } from "./chat-state-host.ts";
 import { resolveChatAgentId } from "./chat-state-route.ts";
-import type { ChatSessionSharingState } from "./components/chat-session-sharing.ts";
+import {
+  canManageChatSessionSharing,
+  type ChatSessionSharingState,
+} from "./components/chat-session-sharing.ts";
 
 export abstract class ChatPaneSharing extends ChatPaneBase {
   protected setSessionSharingState(cacheKey: string, state: ChatSessionSharingState): void {
@@ -48,7 +52,15 @@ export abstract class ChatPaneSharing extends ChatPaneBase {
 
   protected async loadSessionSharing(row: GatewaySessionRow, force = false): Promise<void> {
     const state = this.state;
-    if (!state?.connected || !state.client) {
+    if (
+      !state?.connected ||
+      !state.client ||
+      !canManageChatSessionSharing(row) ||
+      !readSessionMethodAccess(this.context.gateway.snapshot, {
+        method: "session.members.list",
+        requiredScope: "operator.read",
+      }).allowed
+    ) {
       return;
     }
     const cacheKey = this.sessionSharingCacheKey(row.key);
@@ -86,17 +98,26 @@ export abstract class ChatPaneSharing extends ChatPaneBase {
     visibility: SessionVisibility,
   ): Promise<void> {
     const scope = this.captureConnectionScope();
-    if (!scope || visibility === row.visibility) {
+    if (!scope || visibility === row.visibility || !canManageChatSessionSharing(row)) {
       return;
     }
     const agentId = this.sessionSharingAgentId(row.key);
     const cacheKey = this.sessionSharingCacheKey(row.key);
+    const params = {
+      sessionKey: row.key,
+      visibility,
+      ...(agentId ? { agentId } : {}),
+    };
+    if (
+      !readSessionMethodAccess(scope.context.gateway.snapshot, {
+        method: "session.visibility.set",
+        requiredScope: "operator.write",
+      }).allowed
+    ) {
+      return;
+    }
     try {
-      await scope.client.request("session.visibility.set", {
-        sessionKey: row.key,
-        visibility,
-        ...(agentId ? { agentId } : {}),
-      });
+      await scope.client.request("session.visibility.set", params);
       if (!this.isConnectionScopeCurrent(scope)) {
         return;
       }
@@ -123,17 +144,27 @@ export abstract class ChatPaneSharing extends ChatPaneBase {
     member: boolean,
   ): Promise<void> {
     const scope = this.captureConnectionScope();
-    if (!scope) {
+    if (!scope || !canManageChatSessionSharing(row)) {
       return;
     }
     const agentId = this.sessionSharingAgentId(row.key);
     const cacheKey = this.sessionSharingCacheKey(row.key);
+    const method = member ? "session.members.add" : "session.members.remove";
+    const params = {
+      sessionKey: row.key,
+      identityId,
+      ...(agentId ? { agentId } : {}),
+    };
+    if (
+      !readSessionMethodAccess(scope.context.gateway.snapshot, {
+        method,
+        requiredScope: "operator.write",
+      }).allowed
+    ) {
+      return;
+    }
     try {
-      await scope.client.request(member ? "session.members.add" : "session.members.remove", {
-        sessionKey: row.key,
-        identityId,
-        ...(agentId ? { agentId } : {}),
-      });
+      await scope.client.request(method, params);
       if (!this.isConnectionScopeCurrent(scope)) {
         return;
       }
diff --git a/ui/src/pages/chat/components/chat-session-sharing.test.ts b/ui/src/pages/chat/components/chat-session-sharing.test.ts
index 8394134f158f..fd30fab519ab 100644
--- a/ui/src/pages/chat/components/chat-session-sharing.test.ts
+++ b/ui/src/pages/chat/components/chat-session-sharing.test.ts
@@ -127,4 +127,98 @@ describe("chat session sharing menu", () => {
     expect(onVisibilityChange).toHaveBeenCalledWith("shared");
     expect(root.querySelectorAll('wa-dropdown-item[value="visibility:shared"]')).toHaveLength(1);
   });
+
+  it("keeps read-only owner controls visible but refuses disabled synthetic actions", () => {
+    const onOpen = vi.fn();
+    const onVisibilityChange = vi.fn();
+    const onMemberChange = vi.fn();
+    const root = mount(
+      renderChatSessionSharing({
+        session: {
+          key: "agent:main:main",
+          kind: "direct",
+          updatedAt: 1,
+          visibility: "shared",
+          sharingRole: "owner",
+        },
+        state: {
+          loading: false,
+          result: {
+            sessionKey: "agent:main:main",
+            members: [{ identityId: "alice", addedAt: 1 }],
+            identities: [
+              { type: "human", id: "alice", label: "Alice" },
+              { type: "human", id: "bob", label: "Bob" },
+            ],
+            role: "owner",
+            allowedVisibilities: ["shared", "read-only"],
+          },
+        },
+        visibilityDisabledReason: "Requires write",
+        memberAddDisabledReason: "Requires write",
+        memberRemoveDisabledReason: "Requires write",
+        onOpen,
+        onVisibilityChange,
+        onMemberChange,
+      }),
+    );
+    const dropdown = root.querySelector("wa-dropdown");
+    expect(dropdown).not.toBeNull();
+    expect(root.querySelector('wa-dropdown-item[value="visibility:read-only"]')?.title).toBe(
+      "Requires write",
+    );
+    expect(
+      root.querySelector('wa-dropdown-item[value="member:alice"]')?.hasAttribute("disabled"),
+    ).toBe(true);
+    expect(
+      root.querySelector('wa-dropdown-item[value="member:bob"]')?.hasAttribute("disabled"),
+    ).toBe(true);
+
+    dropdown?.dispatchEvent(new CustomEvent("wa-show"));
+    dropdown?.dispatchEvent(
+      new CustomEvent("wa-select", {
+        detail: { item: { value: "visibility:read-only" } },
+      }),
+    );
+    dropdown?.dispatchEvent(
+      new CustomEvent("wa-select", {
+        detail: { item: { value: "member:alice" } },
+      }),
+    );
+    dropdown?.dispatchEvent(
+      new CustomEvent("wa-select", {
+        detail: { item: { value: "member:bob" } },
+      }),
+    );
+
+    expect(onOpen).toHaveBeenCalledOnce();
+    expect(onVisibilityChange).not.toHaveBeenCalled();
+    expect(onMemberChange).not.toHaveBeenCalled();
+  });
+
+  it("disables opening when sharing reads are unavailable", () => {
+    const onOpen = vi.fn();
+    const root = mount(
+      renderChatSessionSharing({
+        session: {
+          key: "agent:main:main",
+          kind: "direct",
+          updatedAt: 1,
+          visibility: "shared",
+          sharingRole: "owner",
+        },
+        state: undefined,
+        openDisabledReason: "Connect to the Gateway",
+        onOpen,
+        onVisibilityChange: vi.fn(),
+        onMemberChange: vi.fn(),
+      }),
+    );
+
+    expect(root.querySelector<HTMLButtonElement>(".chat-pane__sharing-trigger")?.disabled).toBe(
+      true,
+    );
+    root.querySelector("wa-dropdown")?.dispatchEvent(new CustomEvent("wa-show"));
+    expect(onOpen).not.toHaveBeenCalled();
+  });
 });
diff --git a/ui/src/pages/chat/components/chat-session-sharing.ts b/ui/src/pages/chat/components/chat-session-sharing.ts
index ec0cf9c89b60..cd94cd488d10 100644
--- a/ui/src/pages/chat/components/chat-session-sharing.ts
+++ b/ui/src/pages/chat/components/chat-session-sharing.ts
@@ -17,6 +17,10 @@ export type ChatSessionSharingState = {
 type ChatSessionSharingProps = {
   session: GatewaySessionRow | undefined;
   state: ChatSessionSharingState | undefined;
+  openDisabledReason?: string;
+  visibilityDisabledReason?: string;
+  memberAddDisabledReason?: string;
+  memberRemoveDisabledReason?: string;
   onOpen: () => void;
   onVisibilityChange: (visibility: SessionVisibility) => void;
   onMemberChange: (identityId: string, member: boolean) => void;
@@ -36,13 +40,19 @@ function sharingIcon(visibility: SessionVisibility): TemplateResult {
   return visibility === "shared" ? icons.users : icons.lock;
 }
 
+export function canManageChatSessionSharing(
+  session: Pick<GatewaySessionRow, "sharingRole">,
+): boolean {
+  return session.sharingRole === "admin" || session.sharingRole === "owner";
+}
+
 export function renderChatSessionSharing(props: ChatSessionSharingProps) {
   const session = props.session;
   if (!session) {
     return nothing;
   }
   const visibility = session.visibility ?? "shared";
-  const canManage = session.sharingRole === "admin" || session.sharingRole === "owner";
+  const canManage = canManageChatSessionSharing(session);
   if (!canManage) {
     return visibility === "draft"
       ? html`<span class="chat-pane__draft-indicator" title=${t("chat.sessionSharing.draft")}
@@ -61,16 +71,28 @@ export function renderChatSessionSharing(props: ChatSessionSharingProps) {
     <wa-dropdown
       class="chat-pane__sharing-menu"
       placement="bottom-end"
-      @wa-show=${props.onOpen}
+      @wa-show=${() => {
+        if (!props.openDisabledReason) {
+          props.onOpen();
+        }
+      }}
       @wa-select=${(event: CustomEvent<{ item: { value?: string } }>) => {
         const value = event.detail.item.value;
         if (value?.startsWith("visibility:")) {
-          props.onVisibilityChange(value.slice("visibility:".length) as SessionVisibility);
+          if (!props.visibilityDisabledReason) {
+            props.onVisibilityChange(value.slice("visibility:".length) as SessionVisibility);
+          }
           return;
         }
         if (value?.startsWith("member:")) {
           const identityId = value.slice("member:".length);
-          props.onMemberChange(identityId, !members.has(identityId));
+          const member = !members.has(identityId);
+          const disabledReason = member
+            ? props.memberAddDisabledReason
+            : props.memberRemoveDisabledReason;
+          if (!disabledReason) {
+            props.onMemberChange(identityId, member);
+          }
         }
       }}
     >
@@ -79,14 +101,21 @@ export function renderChatSessionSharing(props: ChatSessionSharingProps) {
         class="btn btn--ghost btn--icon chat-icon-btn chat-pane__sharing-trigger"
         type="button"
         aria-label=${t("chat.sessionSharing.menu")}
-        title=${t("chat.sessionSharing.current", {
+        ?disabled=${Boolean(props.openDisabledReason)}
+        title=${props.openDisabledReason ??
+        t("chat.sessionSharing.current", {
           visibility: t(VISIBILITY_LABEL_KEYS[visibility]),
         })}
       >
         ${sharingIcon(visibility)}
       </button>
       ${canPublish
-        ? html`<wa-dropdown-item value="visibility:shared" class="chat-pane__publish-draft">
+        ? html`<wa-dropdown-item
+              value="visibility:shared"
+              class="chat-pane__publish-draft"
+              ?disabled=${Boolean(props.visibilityDisabledReason)}
+              title=${props.visibilityDisabledReason ?? nothing}
+            >
               <span>${t("chat.sessionSharing.publishDraft")}</span>
               <span slot="details" aria-hidden="true">${icons.users}</span>
             </wa-dropdown-item>
@@ -97,7 +126,11 @@ export function renderChatSessionSharing(props: ChatSessionSharingProps) {
         .filter((option) => !canPublish || option !== "shared")
         .map(
           (option) => html`
-            <wa-dropdown-item value=${`visibility:${option}`} ?disabled=${option === visibility}>
+            <wa-dropdown-item
+              value=${`visibility:${option}`}
+              ?disabled=${option === visibility || Boolean(props.visibilityDisabledReason)}
+              title=${props.visibilityDisabledReason ?? nothing}
+            >
               <span>${t(VISIBILITY_LABEL_KEYS[option])}</span>
               ${option === visibility
                 ? html`<span slot="details" aria-hidden="true">${icons.check}</span>`
@@ -110,9 +143,16 @@ export function renderChatSessionSharing(props: ChatSessionSharingProps) {
       ${props.state?.loading
         ? html`<div class="chat-pane__sharing-status">${t("common.loading")}</div>`
         : identities.length > 0
-          ? identities.map(
-              (identity) => html`
-                <wa-dropdown-item value=${`member:${identity.id}`}>
+          ? identities.map((identity) => {
+              const disabledReason = members.has(identity.id)
+                ? props.memberRemoveDisabledReason
+                : props.memberAddDisabledReason;
+              return html`
+                <wa-dropdown-item
+                  value=${`member:${identity.id}`}
+                  ?disabled=${Boolean(disabledReason)}
+                  title=${disabledReason ?? nothing}
+                >
                   <span>${identity.label ?? identity.id}</span>
                   ${members.has(identity.id)
                     ? html`<span slot="details" aria-label=${t("chat.sessionSharing.selected")}
@@ -120,8 +160,8 @@ export function renderChatSessionSharing(props: ChatSessionSharingProps) {
                       >`
                     : nothing}
                 </wa-dropdown-item>
-              `,
-            )
+              `;
+            })
           : html`<div class="chat-pane__sharing-status">${t("chat.sessionSharing.noPeople")}</div>`}
       ${props.state?.error
         ? html`<div class="chat-pane__sharing-status chat-pane__sharing-status--error">