# MCPToolItem

> **Class** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem)

A selectable tool item in the MCP viewer.

## Signature

```python
MCPToolItem(
    self,
    name: str,
    description: str,
    index: int,
    *,
    classes: str = '',
    input_schema: dict[str, Any] | None = None,
)
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `name` | `str` | Yes | Tool name. |
| `description` | `str` | Yes | Full tool description. |
| `index` | `int` | Yes | Flat index of this tool in the list. |
| `classes` | `str` | No | CSS classes. (default: `''`) |
| `input_schema` | `dict[str, Any] \| None` | No | Raw MCP `inputSchema` dict; rendered as parameters when the tool is expanded. `None` is treated as "no schema". (default: `None`) |

## Extends

- `Static`

## Constructors

```python
__init__(
    self,
    name: str,
    description: str,
    index: int,
    *,
    classes: str = '',
    input_schema: dict[str, Any] | None = None,
) -> None
```

| Name | Type |
|------|------|
| `name` | `str` |
| `description` | `str` |
| `index` | `int` |
| `classes` | `str` |
| `input_schema` | `dict[str, Any] \| None` |


## Properties

- `tool_name`
- `tool_description`
- `index`

## Methods

- [`set_selected()`](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem/set_selected)
- [`toggle_expand()`](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem/toggle_expand)
- [`set_expanded()`](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem/set_expanded)
- [`on_mount()`](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem/on_mount)
- [`on_resize()`](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem/on_resize)
- [`on_click()`](https://reference.langchain.com/python/deepagents-code/widgets/mcp_viewer/MCPToolItem/on_click)

---

[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/0412009c5441bef8d75a427e1da8909e33ab5b56/libs/code/deepagents_code/widgets/mcp_viewer.py#L209)