# format_tool_warning_tui

> **Function** in `deepagents_cli`

📖 [View in docs](https://reference.langchain.com/python/deepagents-cli/main/format_tool_warning_tui)

Format a missing-tool warning for the TUI toast.

## Signature

```python
format_tool_warning_tui(
    tool: str,
) -> str
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `tool` | `str` | Yes | Name of the missing tool. |

## Returns

`str`

Plain-text warning suitable for `App.notify`.

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[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/1ae053f347679e58562d2b81eb6d6e6e9bbf0b07/libs/cli/deepagents_cli/main.py#L217)