---
title: "FunctionCallItem"
---

A function call initiated by the model


## Fields

| Field                                                                                           | Type                                                                                            | Required                                                                                        | Description                                                                                     | Example                                                                                         |
| ----------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- |
| `arguments`                                                                                     | *str*                                                                                           | :heavy_check_mark:                                                                              | N/A                                                                                             |                                                                                                 |
| `call_id`                                                                                       | *str*                                                                                           | :heavy_check_mark:                                                                              | N/A                                                                                             |                                                                                                 |
| `id`                                                                                            | *str*                                                                                           | :heavy_check_mark:                                                                              | N/A                                                                                             |                                                                                                 |
| `name`                                                                                          | *str*                                                                                           | :heavy_check_mark:                                                                              | N/A                                                                                             |                                                                                                 |
| `namespace`                                                                                     | *Optional[str]*                                                                                 | :heavy_minus_sign:                                                                              | Namespace qualifier for tools registered as part of a namespace tool group (e.g. an MCP server) |                                                                                                 |
| `status`                                                                                        | [Optional[components.ToolCallStatus]](../components/toolcallstatus.mdx)                          | :heavy_minus_sign:                                                                              | N/A                                                                                             | completed                                                                                       |
| `type`                                                                                          | [components.FunctionCallItemType](../components/functioncallitemtype.mdx)                        | :heavy_check_mark:                                                                              | N/A                                                                                             |                                                                                                 |