{
  "action": "update_calendar_event",
  "args": {
    "calendar": "primary",
    "event_id": "example-calendar-event-id",
    "title": "Updated call with vendor",
    "start": "2026-03-13T18:15:00Z",
    "end": "2026-03-13T18:45:00Z",
    "location": "Updated room",
    "description": "Updated by OpenClaw action bus.",
    "send_updates": "none"
  }
}