json_schema: {
    "properties": {
      "description": {
        "description": "Additional description for the event (optional)",
        "type": "string"
      },
      "end_time": {
        "description": "The end time of the event",
        "type": "string"
      },
      "location": {
        "description": "The location of the event (optional)",
        "type": "string"
      },
      "start_time": {
        "description": "The start time of the event",
        "type": "string"
      },
      "title": {
        "description": "The title of the event",
        "type": "string"
      }
    },
    "required": [
      "title",
      "start_time",
      "end_time"
    ],
    "type": "object"
  }