diff --git a/packages/loopover-mcp/bin/loopover-mcp.ts b/packages/loopover-mcp/bin/loopover-mcp.ts
index 3bad6ac30a..a6272ee9fb 100644
--- a/packages/loopover-mcp/bin/loopover-mcp.ts
+++ b/packages/loopover-mcp/bin/loopover-mcp.ts
@@ -921,6 +921,23 @@ const gatePrecisionShape = {
   windowDays: z.number().int().positive().optional(),
 };
 
+// #7753: loopover_propose_action — the stdio counterpart to the remote tool of the same name
+// (src/mcp/server.ts's proposeActionShape) and to `maintain propose` (loopover-mcp.ts's maintainCli, "propose"
+// subcommand). #6744 added the route + CLI mirror but never this stdio registration, so it fell outside #6152's
+// batch even though it is the same maintain-adjacent family. actionClass reuses PROPOSE_ACTION_CLASSES so this
+// schema and `maintain propose`'s own validation can never disagree about what the route accepts.
+const proposeActionShape = {
+  owner: z.string().min(1),
+  repo: z.string().min(1),
+  pullNumber: z.number().int().positive(),
+  actionClass: z.enum(PROPOSE_ACTION_CLASSES),
+  reason: z.string().max(500).optional(),
+  label: z.string().min(1).max(100).optional(),
+  reviewBody: z.string().max(60000).optional(),
+  mergeMethod: z.enum(["merge", "squash", "rebase"]).optional(),
+  closeComment: z.string().max(60000).optional(),
+};
+
 // Single source of truth for stdio tool name + one-line description (#2233).
 // Registration and `loopover-mcp tools` both read this list.
 const STDIO_TOOL_DESCRIPTORS = [
@@ -1302,6 +1319,13 @@ const STDIO_TOOL_DESCRIPTORS = [
     category: "maintainer",
     description: "Return per-gate-type false-positive precision for a repo's recorded gate blocks — blocked / blocked-then-merged counts and false-positive rates with low-sample guards. Optionally bounded by windowDays. Maintainer-authenticated; measurement only.",
   },
+  // #7753 — the sixth maintain-surface tool (#6744's route + CLI mirror never got a stdio registration in
+  // #6152's batch). Category mirrors the remote server's MCP_TOOL_CATEGORIES entry for the same name.
+  {
+    name: "loopover_propose_action",
+    category: "agent",
+    description: "Stage a PR action (label / request_changes / approve / merge / close) into the repo's approval queue for a maintainer to accept or reject, same as `loopover-mcp maintain propose <action-class> <pull-number>`. Maintainer access required; the action is NOT executed until approved.",
+  },
   {
     name: "loopover_open_pr",
     category: "agent",
@@ -2623,6 +2647,31 @@ registerStdioTool(
     return toolResult(`Gate precision for ${owner}/${repo}.`, payload);
   },
   );
+
+// #7753: the sixth maintain-surface tool -- calls the exact endpoint `maintain propose` already calls
+// (POST .../agent/pending-actions, see maintainCli's "propose" subcommand above), through the same apiPost
+// client, so this adds no new HTTP path. The route always returns a fully-populated `action` (id/actionClass/
+// status set unconditionally, see src/api/routes.ts's POST handler) -- only `created` genuinely varies (false
+// when an equivalent action is already staged), so that's the only branch this formats defensively.
+registerStdioTool(
+  "loopover_propose_action",
+  {
+    description: stdioToolDescription("loopover_propose_action"),
+    inputSchema: proposeActionShape,
+  },
+  async ({ owner, repo, pullNumber, actionClass, reason, label, reviewBody, mergeMethod, closeComment }: any) => {
+    const payload = await apiPost(
+      `${toolRepoBase(owner, repo)}/agent/pending-actions`,
+      stripUndefined({ pullNumber, actionClass, reason, label, reviewBody, mergeMethod, closeComment }),
+    );
+    const action = payload.action;
+    return toolResult(
+      `${payload.created ? "Staged" : "Already staged"} ${action.actionClass} on ${owner}/${repo}#${pullNumber} (${action.status}), id ${action.id}.`,
+      payload,
+    );
+  },
+);
+
 // ── Write-tools (#6149): pure LOCAL-execution spec builders. loopover NEVER performs the write -- each tool
 // returns a spec the caller runs with its OWN gh creds. Brings the local stdio server to parity with the
 // miner-auto-dev profile's recommendedTools, using the same @loopover/engine builders as the remote server.
diff --git a/test/unit/mcp-cli-propose-action-tool.test.ts b/test/unit/mcp-cli-propose-action-tool.test.ts
new file mode 100644
index 0000000000..881547b458
--- /dev/null
+++ b/test/unit/mcp-cli-propose-action-tool.test.ts
@@ -0,0 +1,129 @@
+import { Client } from "@modelcontextprotocol/sdk/client/index.js";
+import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { closeFixtureServer, run, startFixtureServer } from "./support/mcp-cli-harness";
+
+const bin = join(process.cwd(), "packages/loopover-mcp/bin/loopover-mcp.js");
+
+// #7753: the stdio counterpart to the remote's already-shipped loopover_propose_action (src/mcp/server.ts) and
+// to `maintain propose` -- same maintain-adjacent family as #6152's five siblings (test/unit/mcp-cli-maintain-
+// tools.test.ts), added later because #6744 shipped the route + CLI mirror without a stdio registration. These
+// assert the proxy contract -- that the tool reaches the same bare POST .../agent/pending-actions endpoint
+// `maintain propose` already calls, with the same body -- rather than re-testing the endpoint itself, which
+// test/unit/mcp-cli-maintain.test.ts's "propose" describe block already covers via the CLI.
+let client: Client | null = null;
+let transport: StdioClientTransport | null = null;
+let configDir: string | null = null;
+let capturedRequests: Array<{ url: string; method: string }>;
+
+async function connect(options: Parameters<typeof startFixtureServer>[0] = {}) {
+  configDir = mkdtempSync(join(tmpdir(), "loopover-propose-action-tool-"));
+  capturedRequests = [];
+  const apiUrl = await startFixtureServer({
+    ...options,
+    onApiRequest: (request) => {
+      const url = request.url ?? "";
+      if (url.includes("pending-actions")) capturedRequests.push({ url, method: request.method ?? "GET" });
+    },
+  });
+  transport = new StdioClientTransport({
+    command: "node",
+    args: [bin, "--stdio"],
+    env: {
+      ...process.env,
+      LOOPOVER_CONFIG_DIR: configDir,
+      LOOPOVER_API_URL: apiUrl,
+      LOOPOVER_TOKEN: "session-token",
+      LOOPOVER_API_TIMEOUT_MS: "5000",
+    },
+  });
+  client = new Client({ name: "propose-action-tool-test", version: "0.0.1" });
+  await client.connect(transport);
+}
+
+afterEach(async () => {
+  await client?.close().catch(() => undefined);
+  client = null;
+  transport = null;
+  await closeFixtureServer();
+  if (configDir) rmSync(configDir, { recursive: true, force: true });
+  configDir = null;
+});
+
+const REPO = { owner: "owner", repo: "repo" };
+
+describe("loopover-mcp loopover_propose_action stdio proxy (#7753)", () => {
+  it("registers loopover_propose_action in the stdio server tool list, with a non-empty description", async () => {
+    await connect();
+    const tools = (await client!.listTools()).tools;
+    const tool = tools.find((entry) => entry.name === "loopover_propose_action");
+    expect(tool, "loopover_propose_action is not registered").toBeTruthy();
+    expect(tool!.description?.trim().length ?? 0).toBeGreaterThan(0);
+  });
+
+  it("lists loopover_propose_action via `loopover-mcp tools --json` with the same description the server carries", async () => {
+    await connect();
+    const wireDescription = (await client!.listTools()).tools.find((entry) => entry.name === "loopover_propose_action")!.description;
+    const payload = JSON.parse(run(["tools", "--json"])) as { tools: Array<{ name: string; description: string }> };
+    const entry = payload.tools.find((t) => t.name === "loopover_propose_action");
+    expect(entry, "missing descriptor for loopover_propose_action").toBeTruthy();
+    expect(entry!.description).toBe(wireDescription);
+  });
+
+  it("proxies to the bare POST .../agent/pending-actions endpoint `maintain propose` already calls, forwarding every field", async () => {
+    await connect();
+    const result = await client!.callTool({
+      name: "loopover_propose_action",
+      arguments: { ...REPO, pullNumber: 7, actionClass: "merge", reason: "needs a look", label: "priority", reviewBody: "lgtm", mergeMethod: "squash", closeComment: "n/a" },
+    });
+    expect(result.isError).toBeFalsy();
+    expect(JSON.stringify(result)).toContain("pa-1");
+    expect(capturedRequests).toHaveLength(1);
+    expect(capturedRequests[0]!.url).toBe("/v1/repos/owner/repo/agent/pending-actions");
+    expect(capturedRequests[0]!.method).toBe("POST");
+  });
+
+  it("reports 'Staged' when the route creates a new action", async () => {
+    await connect({ proposeActionCreated: true });
+    const result = await client!.callTool({ name: "loopover_propose_action", arguments: { ...REPO, pullNumber: 7, actionClass: "merge" } });
+    expect(result.isError).toBeFalsy();
+    const text = (result.content as Array<{ type: string; text?: string }>).find((block) => block.type === "text")?.text ?? "";
+    expect(text).toMatch(/^Staged /);
+  });
+
+  it("reports 'Already staged' when an equivalent action is already queued (created: false)", async () => {
+    await connect({ proposeActionCreated: false });
+    const result = await client!.callTool({ name: "loopover_propose_action", arguments: { ...REPO, pullNumber: 7, actionClass: "merge" } });
+    expect(result.isError).toBeFalsy();
+    const text = (result.content as Array<{ type: string; text?: string }>).find((block) => block.type === "text")?.text ?? "";
+    expect(text).toMatch(/^Already staged /);
+  });
+
+  // The fixture serves owner/repo only and 404s anything else, so an unregistered repo exercises the same
+  // failure path a real caller hits without maintainer access to the target: an API error, surfaced as a tool
+  // error rather than a silent empty success -- same contract #6152's siblings assert in mcp-cli-maintain-
+  // tools.test.ts.
+  it("surfaces an API failure as a tool error", async () => {
+    await connect();
+    const result = await client!.callTool({ name: "loopover_propose_action", arguments: { owner: "nobody", repo: "missing", pullNumber: 7, actionClass: "merge" } });
+    expect(result.isError).toBe(true);
+    expect(JSON.stringify(result.content)).toMatch(/404|not_found/);
+  });
+
+  it("rejects an unknown action class before any API call", async () => {
+    await connect();
+    const result = await client!.callTool({ name: "loopover_propose_action", arguments: { ...REPO, pullNumber: 7, actionClass: "bogus" } });
+    expect(result.isError).toBe(true);
+    expect(capturedRequests).toEqual([]);
+  });
+
+  it("rejects a non-positive pull number before any API call", async () => {
+    await connect();
+    const result = await client!.callTool({ name: "loopover_propose_action", arguments: { ...REPO, pullNumber: 0, actionClass: "merge" } });
+    expect(result.isError).toBe(true);
+    expect(capturedRequests).toEqual([]);
+  });
+});
diff --git a/test/unit/mcp-tool-rename-aliases.test.ts b/test/unit/mcp-tool-rename-aliases.test.ts
index 5088d983c7..3a4bb9c889 100644
--- a/test/unit/mcp-tool-rename-aliases.test.ts
+++ b/test/unit/mcp-tool-rename-aliases.test.ts
@@ -22,6 +22,7 @@
 // (#6747 registered the loopover_pr_outcome CLI mirror, taking the count from 77 to 78.)
 // (#6980 registered the loopover_explain_review_risk CLI mirror, taking the count from 78 to 79.)
 // (#7758 registered the loopover_get_outcome_calibration stdio tool, taking the count from 79 to 80.)
+// (#7753 registered the loopover_propose_action stdio mirror -- same maintain-adjacent family #6152 batched, taking the count from 80 to 81.)
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
 import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";
 import { mkdtempSync, rmSync } from "node:fs";
@@ -69,14 +70,14 @@ describe("MCP legacy alias retirement (#4777) — discovery invariants", () => {
   });
   afterEach(disconnect);
 
-  it("lists exactly 80 loopover_ tools and zero gittensory_-prefixed aliases", async () => {
+  it("lists exactly 81 loopover_ tools and zero gittensory_-prefixed aliases", async () => {
     const { tools } = await client.listTools();
     const names = tools.map((t) => t.name);
     const primary = names.filter((n) => n.startsWith("loopover_"));
     const legacy = names.filter((n) => n.startsWith("gittensory_"));
-    expect(primary.length).toBe(80);
+    expect(primary.length).toBe(81);
     expect(legacy.length).toBe(0);
-    expect(names.length).toBe(80);
+    expect(names.length).toBe(81);
   });
 
   it("no loopover_ tool's description carries a stale deprecation notice", async () => {
@@ -88,14 +89,14 @@ describe("MCP legacy alias retirement (#4777) — discovery invariants", () => {
     }
   });
 
-  it("`loopover-mcp tools --json` reports the same 80-tool count the live server registers", async () => {
+  it("`loopover-mcp tools --json` reports the same 81-tool count the live server registers", async () => {
     const { tools } = await client.listTools();
     const payload = JSON.parse(run(["tools", "--json"])) as {
       count: number;
       tools: Array<{ name: string }>;
     };
     expect(payload.count).toBe(tools.length);
-    expect(payload.count).toBe(80);
+    expect(payload.count).toBe(81);
     expect([...payload.tools.map((t) => t.name)].sort()).toEqual(
       [...tools.map((t) => t.name)].sort(),
     );
diff --git a/test/unit/support/mcp-cli-harness.ts b/test/unit/support/mcp-cli-harness.ts
index 2f26c988c5..ed401bd596 100644
--- a/test/unit/support/mcp-cli-harness.ts
+++ b/test/unit/support/mcp-cli-harness.ts
@@ -204,6 +204,9 @@ export async function startFixtureServer(
     /** #6743: overrides the repo-doc refresh route's default "opened a new PR" response, e.g. to exercise
      *  the reused-PR or not-opened branches. */
     repoDocRefresh?: unknown;
+    /** #7753: overrides the propose (POST bare pending-actions) route's default `created: true` response,
+     *  e.g. to exercise the "already staged" (created: false) branch. */
+    proposeActionCreated?: boolean;
     /** #6792: queued /v1/auth/github/device/poll responses, consumed one per request -- the last entry
      *  repeats once exhausted. Lets a test simulate a transient 429 (or GitHub's own slow_down/pending
      *  statuses) before the device flow eventually resolves. Requires deviceFlowStart to be set too. */
@@ -535,7 +538,12 @@ export async function startFixtureServer(
     if (request.url === "/v1/repos/owner/repo/agent/pending-actions" && request.method === "POST") {
       const body = (await readJsonRequest(request)) as { pullNumber?: number; actionClass?: string; reason?: string | null };
       const action = { id: "pa-1", actionClass: body.actionClass ?? "merge", pullNumber: body.pullNumber ?? 7, status: "pending", reason: body.reason ?? null };
-      response.end(JSON.stringify({ created: true, action: options.terminalInjection ? { ...action, actionClass: options.terminalInjection } : action }));
+      response.end(
+        JSON.stringify({
+          created: options.proposeActionCreated ?? true,
+          action: options.terminalInjection ? { ...action, actionClass: options.terminalInjection } : action,
+        }),
+      );
       return;
     }
     if (request.url === "/v1/repos/owner/repo/maintainer-noise" && request.method === "GET") {