# ToolOutputMixin

> **Class** in `langgraph`

📖 [View in docs](https://reference.langchain.com/python/langgraph/types/ToolOutputMixin)

## Signature

```python
ToolOutputMixin()
```

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[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/b674dd46228b0928a6bc0ad9a3d8e38ef28f6895/libs/langgraph/langgraph/types.py#L47)