diff --git a/.changeset/mcp-one-hour-active-work.md b/.changeset/mcp-one-hour-active-work.md
new file mode 100644
index 0000000000..ca27109eed
--- /dev/null
+++ b/.changeset/mcp-one-hour-active-work.md
@@ -0,0 +1,5 @@
+---
+"@executor-js/plugin-mcp": patch
+---
+
+An upstream MCP tool call now has one hour of active work before it is cut off, up from 60 seconds, so a single long tool call finishes. The deadline still pauses while an elicitation waits for input, and one hour still bounds a hung upstream.
diff --git a/e2e/selfhost/mcp-elicitation-deadline.test.ts b/e2e/selfhost/mcp-elicitation-deadline.test.ts
index eaf925554a..94c9e77ef2 100644
--- a/e2e/selfhost/mcp-elicitation-deadline.test.ts
+++ b/e2e/selfhost/mcp-elicitation-deadline.test.ts
@@ -69,8 +69,9 @@ scenario(
           code: `return await tools.${slug}.org.main.approve({});`,
         });
         expect(paused.text).toContain("executionId:");
-        // Cross the production 60-second active-work deadline. This is the
-        // behavior under test: a human waiting must consume none of that budget.
+        // The production active-work deadline is one hour, too long to cross
+        // here. The unit tests in plugin-mcp prove the deadline pauses; this
+        // checks that a delayed approval still resumes with its chosen lifetime.
         yield* Effect.sleep("65 seconds");
         const executionId = decodeExecutionId(/\bexecutionId:\s*(\S+)/.exec(paused.text)?.[1]);
         const completed = yield* session.call("resume", {
diff --git a/packages/plugins/mcp/src/sdk/invoke.test.ts b/packages/plugins/mcp/src/sdk/invoke.test.ts
index bb48e9908a..d7ab5dd59c 100644
--- a/packages/plugins/mcp/src/sdk/invoke.test.ts
+++ b/packages/plugins/mcp/src/sdk/invoke.test.ts
@@ -24,6 +24,8 @@ beforeAll(() => loadMcpClientSdk());
 import { McpInvocationError, McpOAuthReauthorizationRequired } from "./errors";
 import { invokeMcpTool, makeActiveWorkDeadline, MCP_ACTIVE_WORK_TIMEOUT_MS } from "./invoke";
 
+const ONE_HOUR_MS = 3_600_000;
+
 const acceptAll = () => Effect.succeed(ElicitationResponse.make({ action: "accept" }));
 
 const rejectingConnector = (cause: unknown): McpConnector =>
@@ -167,6 +169,18 @@ const invocationRejectionCases = [
 describe("invokeMcpTool", () => {
   afterEach(() => vi.useRealTimers());
 
+  it("defaults the active-work deadline to one hour", () => {
+    vi.useFakeTimers({ toFake: ["Date", "setTimeout", "clearTimeout"] });
+    expect(MCP_ACTIVE_WORK_TIMEOUT_MS).toBe(3_600_000);
+    const deadline = makeActiveWorkDeadline();
+
+    vi.advanceTimersByTime(3_599_999);
+    expect(deadline.signal.aborted).toBe(false);
+    vi.advanceTimersByTime(1);
+    expect(deadline.signal.aborted).toBe(true);
+    deadline.dispose();
+  });
+
   it("pauses the active-work deadline across overlapping elicitations", () => {
     vi.useFakeTimers({ toFake: ["Date", "setTimeout", "clearTimeout"] });
     const deadline = makeActiveWorkDeadline(100);
@@ -249,14 +263,14 @@ describe("invokeMcpTool", () => {
     );
 
     await elicitationStarted;
-    expect(callOptions?.timeout).toBeGreaterThan(MCP_ACTIVE_WORK_TIMEOUT_MS);
-    vi.advanceTimersByTime(MCP_ACTIVE_WORK_TIMEOUT_MS);
+    expect(callOptions?.timeout).toBeGreaterThan(ONE_HOUR_MS);
+    vi.advanceTimersByTime(ONE_HOUR_MS);
     expect(callOptions?.signal.aborted).toBe(false);
 
     finishElicitation!();
     await Promise.resolve();
     await Promise.resolve();
-    vi.advanceTimersByTime(MCP_ACTIVE_WORK_TIMEOUT_MS);
+    vi.advanceTimersByTime(ONE_HOUR_MS);
     expect(callOptions?.signal.aborted).toBe(true);
     expect(await invocation).toBe("failed");
   });
diff --git a/packages/plugins/mcp/src/sdk/invoke.ts b/packages/plugins/mcp/src/sdk/invoke.ts
index ed67dd2312..142de9f2ff 100644
--- a/packages/plugins/mcp/src/sdk/invoke.ts
+++ b/packages/plugins/mcp/src/sdk/invoke.ts
@@ -50,7 +50,7 @@ import {
  * the normal deadline and is paused while one or more elicitation handlers are
  * waiting for input.
  */
-export const MCP_ACTIVE_WORK_TIMEOUT_MS = 60_000;
+export const MCP_ACTIVE_WORK_TIMEOUT_MS = 3_600_000;
 const MCP_SDK_TIMEOUT_BACKSTOP_MS = 2_147_483_647;
 
 export type ActiveWorkDeadline = {