---
title: "ChatFunctionToolFunctionFunction"
---

Function definition for tool calling


## Fields

| Field                                                                                                                            | Type                                                                                                                             | Required                                                                                                                         | Description                                                                                                                      | Example                                                                                                                          |
| -------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- |
| `description`                                                                                                                    | *Optional[str]*                                                                                                                  | :heavy_minus_sign:                                                                                                               | Function description for the model                                                                                               | Get the current weather for a location                                                                                           |
| `name`                                                                                                                           | *str*                                                                                                                            | :heavy_check_mark:                                                                                                               | Function name (a-z, A-Z, 0-9, underscores, dashes, max 64 chars)                                                                 | get_weather                                                                                                                      |
| `parameters`                                                                                                                     | Dict[str, *Nullable[Any]*]                                                                                                       | :heavy_minus_sign:                                                                                                               | Function parameters as JSON Schema object                                                                                        | \{<br/>"properties": \{<br/>"location": \{<br/>"description": "City name",<br/>"type": "string"<br/>}<br/>},<br/>"required": [<br/>"location"<br/>],<br/>"type": "object"<br/>} |
| `strict`                                                                                                                         | *OptionalNullable[bool]*                                                                                                         | :heavy_minus_sign:                                                                                                               | Enable strict schema adherence                                                                                                   | false                                                                                                                            |