# ChainConfig

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/agents/mrkl/base/ChainConfig)

Configuration for a chain to use in MRKL system.

## Signature

```python
ChainConfig()
```

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| `action_name` | `unknown` | Yes | Name of the action. |
| `action` | `unknown` | Yes | Action function to call. |
| `action_description` | `unknown` | Yes | Description of the action. |

## Extends

- `NamedTuple`

## Properties

- `action_name`
- `action`
- `action_description`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f0c5a28fa05adcda89aebcb449d897245ab21fa4/libs/langchain/langchain_classic/agents/mrkl/base.py#L26)