# ToolCallMessage

> **Class** in `deepagents_cli`

📖 [View in docs](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage)

Widget displaying a tool call with collapsible output.

Tool outputs are shown as a 3-line preview by default.
Press Ctrl+O to expand/collapse the full output.
Shows an animated "Running..." indicator while the tool is executing.

## Signature

```python
ToolCallMessage(
    self,
    tool_name: str,
    args: dict[str, Any] | None = None,
    **kwargs: Any = {},
)
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `tool_name` | `str` | Yes | Name of the tool being called |
| `args` | `dict[str, Any] \| None` | No | Tool arguments (optional) (default: `None`) |
| `**kwargs` | `Any` | No | Additional arguments passed to parent (default: `{}`) |

## Extends

- `Vertical`

## Constructors

```python
__init__(
    self,
    tool_name: str,
    args: dict[str, Any] | None = None,
    **kwargs: Any = {},
) -> None
```

| Name | Type |
|------|------|
| `tool_name` | `str` |
| `args` | `dict[str, Any] \| None` |


## Properties

- `DEFAULT_CSS`
- `has_output`

## Methods

- [`compose()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/compose)
- [`on_mount()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/on_mount)
- [`set_running()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/set_running)
- [`set_success()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/set_success)
- [`set_error()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/set_error)
- [`set_rejected()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/set_rejected)
- [`set_skipped()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/set_skipped)
- [`toggle_output()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/toggle_output)
- [`on_click()`](https://reference.langchain.com/python/deepagents-cli/widgets/messages/ToolCallMessage/on_click)

---

[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/a9e6e4f7ad7fe161dd9affc3d74bb19784aca70b/libs/cli/deepagents_cli/widgets/messages.py#L687)