# ToolDefinitionJSON


## Fields

| Field                                                                                                          | Type                                                                                                           | Required                                                                                                       | Description                                                                                                    |
| -------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------- |
| `type`                                                                                                         | *Literal["function"]*                                                                                          | :heavy_check_mark:                                                                                             | N/A                                                                                                            |
| `function`                                                                                                     | [components.ToolDefinitionJSONFunction](../components/tooldefinitionjsonfunction.md)                           | :heavy_check_mark:                                                                                             | N/A                                                                                                            |
| `cache_control`                                                                                                | [Optional[components.ChatMessageContentItemCacheControl]](../components/chatmessagecontentitemcachecontrol.md) | :heavy_minus_sign:                                                                                             | N/A                                                                                                            |