diff --git a/apps/sim/app/api/copilot/tools/execute/route.test.ts b/apps/sim/app/api/copilot/tools/execute/route.test.ts
index 716fbeb9ffd..79efd345ce4 100644
--- a/apps/sim/app/api/copilot/tools/execute/route.test.ts
+++ b/apps/sim/app/api/copilot/tools/execute/route.test.ts
@@ -125,4 +125,52 @@ describe('POST /api/copilot/tools/execute (in-band)', () => {
     )
     expect(mockPrepareEnvironmentContext).toHaveBeenCalledTimes(1)
   })
+
+  /**
+   * The generated key is a browser-only artifact. This lane's response is what Go feeds the
+   * model, so it must carry the same projection the resume lane produces — the status message
+   * alone. A `key` field here would put the plaintext credential in model context.
+   */
+  it('returns only the status message for generate_api_key, never the key', async () => {
+    const message = 'API key "demo" created. You did NOT receive the key value'
+    mockHandler.mockResolvedValue({
+      success: true,
+      output: { id: 'key-1', name: 'demo', key: 'sk_live_plaintext', workspaceId: 'ws-1', message },
+    })
+
+    const res = await POST(
+      makeRequest({
+        ...BASE_BODY,
+        toolName: 'generate_api_key',
+        params: { name: 'demo' },
+        messageId: 'msg-api-key',
+      }) as never
+    )
+    const body = await res.json()
+
+    expect(body).toEqual({ success: true, output: message })
+    expect(JSON.stringify(body)).not.toContain('sk_live_plaintext')
+  })
+
+  it('leaves a non-generate_api_key result carrying a key field untouched', async () => {
+    mockHandler.mockResolvedValue({ success: true, output: { key: 'lookup-key', value: 42 } })
+    const res = await POST(makeRequest({ ...BASE_BODY, messageId: 'msg-other-tool-key' }) as never)
+    await expect(res.json()).resolves.toEqual({
+      success: true,
+      output: { key: 'lookup-key', value: 42 },
+    })
+  })
+
+  it('passes a failed generate_api_key call through with its error', async () => {
+    mockHandler.mockResolvedValue({ success: false, error: 'name is required' })
+    const res = await POST(
+      makeRequest({
+        ...BASE_BODY,
+        toolName: 'generate_api_key',
+        params: {},
+        messageId: 'msg-api-key-error',
+      }) as never
+    )
+    await expect(res.json()).resolves.toEqual({ success: false, error: 'name is required' })
+  })
 })
diff --git a/apps/sim/app/api/copilot/tools/execute/route.ts b/apps/sim/app/api/copilot/tools/execute/route.ts
index b6a0c57c2ec..284a2e5286c 100644
--- a/apps/sim/app/api/copilot/tools/execute/route.ts
+++ b/apps/sim/app/api/copilot/tools/execute/route.ts
@@ -3,6 +3,7 @@ import { getErrorMessage } from '@sim/utils/errors'
 import { type NextRequest, NextResponse } from 'next/server'
 import { copilotToolExecuteInternalBodySchema } from '@/lib/api/contracts/copilot'
 import { validationErrorResponse } from '@/lib/api/server'
+import { toolResultForModel } from '@/lib/copilot/chat/sim-key-redaction'
 import { prepareCopilotEnvironmentContext } from '@/lib/copilot/environment-context'
 import { MothershipStreamV1ToolOutcome } from '@/lib/copilot/generated/mothership-stream-v1'
 import { TraceAttr } from '@/lib/copilot/generated/trace-attributes-v1'
@@ -243,9 +244,17 @@ export const POST = withRouteHandler((request: NextRequest) =>
             })
           })
         }
+        /**
+         * The response IS the model-facing channel on this lane — Go relays it straight into
+         * the turn — so it carries the same projection the resume lane's
+         * `getToolCallTerminalData` produces, not the raw handler output. Without this,
+         * `generate_api_key`'s freshly minted plaintext key crossed to the model here while
+         * the redaction held on the other lane. Every other tool is returned unchanged.
+         */
+        const modelOutput = toolResultForModel(toolName, projected.output)
         return NextResponse.json({
           success: projected.success,
-          ...(projected.output !== undefined ? { output: projected.output } : {}),
+          ...(modelOutput !== undefined ? { output: modelOutput } : {}),
           ...(projected.error ? { error: projected.error } : {}),
         })
       } catch (err) {