# ToolInputSchema

> **Class** in `langchain_sema4`

📖 [View in docs](https://reference.langchain.com/python/langchain-sema4/toolkits/ToolInputSchema)

Tool input schema.

## Signature

```python
ToolInputSchema()
```

## Extends

- `BaseModel`

## Properties

- `question`

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[View source on GitHub](https://github.com/langchain-ai/langchain-sema4/blob/14caa588ea60d411598f096d0734099bedcca0dd/libs/sema4/langchain_sema4/toolkits.py#L58)