k
curl -X PATCH "https://api.vapi.ai/tool/{toolId}" \
  -H "Authorization: Bearer {your private token}" \
  -H "Content-Type: application/json" \
  -d '{
    "function": {
      "name": "booked_call",
      "description": "representing the booked call by creating a card on the dispatch.",
      "parameters": {
        "type": "object",
        "required": [
          "Date",
          "Start Time",
          "End Time"
        ],
        "properties": {
          "date": {
            "type": "string",
            "description": "the date the customer wants to book the appointment in"
          },
          "end_time": {
            "type": "string",
            "description": "the End time of the appointment \"hh:mm\""
          },
          "start_time": {
            "type": "string",
            "description": "the start time of the appointment \"hh:mm\""
          }
        }
      }
    }
  }'

this will help you do it by using it on any command prompt for now, just don't forget to use your own values.