diff --git a/packages/core/src/agents/browser/browserAgentInvocation.test.ts b/packages/core/src/agents/browser/browserAgentInvocation.test.ts
index 8b7b11144c..452a4025b1 100644
--- a/packages/core/src/agents/browser/browserAgentInvocation.test.ts
+++ b/packages/core/src/agents/browser/browserAgentInvocation.test.ts
@@ -458,7 +458,7 @@ describe('BrowserAgentInvocation', () => {
         isSubagentActivityEvent: true,
         agentName: 'browser_agent',
         type: 'TOOL_CALL_END',
-        data: { name: 'navigate_browser', id: 'call-1' },
+        data: { name: 'navigate_browser', callId: 'call-1' },
       });
 
       await executePromise;
diff --git a/packages/core/src/agents/browser/browserAgentInvocation.ts b/packages/core/src/agents/browser/browserAgentInvocation.ts
index a27a8d29ed..d6f3bde759 100644
--- a/packages/core/src/agents/browser/browserAgentInvocation.ts
+++ b/packages/core/src/agents/browser/browserAgentInvocation.ts
@@ -217,8 +217,8 @@ export class BrowserAgentInvocation extends BaseToolInvocation<
             break;
           }
           case 'TOOL_CALL_END': {
-            const callId = activity.data['id']
-              ? String(activity.data['id'])
+            const callId = activity.data['callId']
+              ? String(activity.data['callId'])
               : undefined;
             const data = activity.data['data'];
             const isError = isToolActivityError(data);
diff --git a/packages/core/src/agents/local-executor.ts b/packages/core/src/agents/local-executor.ts
index 76e76810ae..d3e076f716 100644
--- a/packages/core/src/agents/local-executor.ts
+++ b/packages/core/src/agents/local-executor.ts
@@ -1230,7 +1230,7 @@ export class LocalAgentExecutor<TOutput extends z.ZodTypeAny> {
         if (call.status === 'success') {
           this.emitActivity('TOOL_CALL_END', {
             name: toolName,
-            id: call.request.callId,
+            callId: call.request.callId,
             output: call.response.resultDisplay,
             data: call.response.data,
           });
diff --git a/packages/core/src/agents/local-invocation.ts b/packages/core/src/agents/local-invocation.ts
index 5ed7a27c04..74474c8a16 100644
--- a/packages/core/src/agents/local-invocation.ts
+++ b/packages/core/src/agents/local-invocation.ts
@@ -185,8 +185,8 @@ export class LocalSubagentInvocation extends BaseToolInvocation<
             const data = activity.data['data'];
             const isError = isToolActivityError(data);
 
-            const callId = activity.data['id']
-              ? String(activity.data['id'])
+            const callId = activity.data['callId']
+              ? String(activity.data['callId'])
               : undefined;
 
             if (callId) {
diff --git a/packages/core/src/agents/local-session-invocation.ts b/packages/core/src/agents/local-session-invocation.ts
index 6b356349e7..a3d53eeeab 100644
--- a/packages/core/src/agents/local-session-invocation.ts
+++ b/packages/core/src/agents/local-session-invocation.ts
@@ -182,8 +182,8 @@ export class LocalSessionInvocation extends BaseToolInvocation<
           const data = activity.data['data'];
           const isError = isToolActivityError(data);
 
-          const callId = activity.data['id']
-            ? String(activity.data['id'])
+          const callId = activity.data['callId']
+            ? String(activity.data['callId'])
             : undefined;
 
           if (callId) {