{
  "type": "function",
  "function": {
    "name": "my_function",
    "description": "Describe what this schema extracts or produces",
    "parameters": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "description": "The user's full name"
        },
        "age": {
          "type": "integer",
          "description": "The user's age in years"
        },
        "role": {
          "type": "string",
          "description": "The user's role",
          "enum": [
            "admin",
            "editor",
            "viewer"
          ]
        }
      },
      "required": [
        "name",
        "role"
      ],
      "additionalProperties": false
    }
  }
}