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Notifications about the lifecycle of tool runs, including start, approval, progress, and completion. Subscribe to monitor and intervene in tool usage.

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NOTIFICATION_TOOL_EXECUTION_INITIATED

Tool execution started. 
{
  "type": "NOTIFICATION_TOOL_EXECUTION_INITIATED",
  "eventId": "evt_1",
  "threadId": "thread_456",
  "requestId": "req_1",
  "eventMessage": {
    "agent": null,
    "content": "tool execution started",
    "collaborationId": null,
    "activeAssistantCollaborationRequired": null,
    "toolExecutionApprovalRequest": null,
    "timestamp": "2025-08-12T00:00:00"
  }
}

​
NOTIFICATION_TOOL_EXECUTION_IN_PROGRESS

Tool execution in progress. 
{
  "type": "NOTIFICATION_TOOL_EXECUTION_IN_PROGRESS",
  "eventId": "evt_1",
  "threadId": "thread_456",
  "requestId": "req_1",
  "eventMessage": {
    "agent": null,
    "content": "tool execution in progress",
    "collaborationId": null,
    "activeAssistantCollaborationRequired": null,
    "toolExecutionApprovalRequest": null,
    "timestamp": "2025-08-12T00:00:00"
  }
}

​
NOTIFICATION_TOOL_EXECUTION_APPROVAL_REQUIRED

Tool execution requires approval. 
{
  "type": "NOTIFICATION_TOOL_EXECUTION_APPROVAL_REQUIRED",
  "eventId": "evt_1",
  "threadId": "thread_456",
  "requestId": "req_1",
  "eventMessage": {
    "agent": null,
    "content": "tool execution requires approval",
    "collaborationId": null,
    "activeAssistantCollaborationRequired": null,
    "toolExecutionApprovalRequest": null,
    "timestamp": "2025-08-12T00:00:00"
  }
}

​
NOTIFICATION_TOOL_EXECUTION_APPROVAL_ACCEPTED

Tool execution approved. 
{
  "type": "NOTIFICATION_TOOL_EXECUTION_APPROVAL_ACCEPTED",
  "eventId": "evt_1",
  "threadId": "thread_456",
  "requestId": "req_1",
  "eventMessage": {
    "agent": null,
    "content": "tool execution approved",
    "collaborationId": null,
    "activeAssistantCollaborationRequired": null,
    "toolExecutionApprovalRequest": null,
    "timestamp": "2025-08-12T00:00:00"
  }
}

​
NOTIFICATION_TOOL_EXECUTION_APPROVAL_DENIED

Tool execution denied. 
{
  "type": "NOTIFICATION_TOOL_EXECUTION_APPROVAL_DENIED",
  "eventId": "evt_1",
  "threadId": "thread_456",
  "requestId": "req_1",
  "eventMessage": {
    "agent": null,
    "content": "tool execution denied",
    "collaborationId": null,
    "activeAssistantCollaborationRequired": null,
    "toolExecutionApprovalRequest": null,
    "timestamp": "2025-08-12T00:00:00"
  }
}

​
NOTIFICATION_TOOL_EXECUTION_APPROVAL_ABORTED

Tool execution aborted with feedback. 
{
  "type": "NOTIFICATION_TOOL_EXECUTION_APPROVAL_ABORTED",
  "eventId": "evt_1",
  "threadId": "thread_456",
  "requestId": "req_1",
  "eventMessage": {
    "agent": null,
    "content": "tool execution aborted with feedback",
    "collaborationId": null,
    "activeAssistantCollaborationRequired": null,
    "toolExecutionApprovalRequest": null,
    "timestamp": "2025-08-12T00:00:00"
  }
}
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