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{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "minLength": 1,
      "description": "Stable id from calendar_list_events, prior tool results, or host. Never substitute title for id."
    },
    "title": {
      "type": "string",
      "minLength": 1,
      "description": "New display title. Omit to leave the current title unchanged."
    },
    "start": {
      "type": "string",
      "format": "date-time",
      "description": "New inclusive event start (ISO 8601 with explicit offset). Omit to leave the current start unchanged."
    },
    "end": {
      "type": [
        "string",
        "null"
      ],
      "format": "date-time",
      "description": "New exclusive event end (ISO 8601 with explicit offset) or null. Omit to leave the current end unchanged."
    },
    "allDay": {
      "type": "boolean",
      "description": "Whether the event is all-day. Omit to leave unchanged."
    }
  },
  "required": [
    "id"
  ],
  "minProperties": 2,
  "additionalProperties": false
}