> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # PrivateEndpointSettingsToolChoice ## Fields | Field | Type | Required | Description | | - | - | - | - | | `Auto` | `bool` | ✔️ | Accepts `tool_choice: "auto"`. | | `Function` | `bool` | ✔️ | Accepts a named function in `tool_choice`. | | `None` | `bool` | ✔️ | Accepts `tool_choice: "none"`. | | `Required` | `bool` | ✔️ | Accepts `tool_choice: "required"`. |