> ## Documentation Index
> Fetch the complete documentation index at: https://attesta.kyberon.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# LangChain Tool Approval

> Wrap LangChain tools with risk-based gating

## Scenario

A LangChain agent can run both read-only and destructive tools. We want low-friction reads and strict gating for writes.

## Example App

Reference implementation: `examples/langchain-tooling-approval/`

* wraps tools with `AttestaToolWrapper`
* applies per-tool risk overrides
* keeps audit consistency across tool invocations

## Core Pattern

```python theme={"theme":{"light":"github-light","dark":"github-dark-dimmed"}}
from attesta import Attesta
from attesta.integrations.langchain import AttestaToolWrapper

attesta = Attesta.from_config("attesta.yaml")
wrapper = AttestaToolWrapper(attesta, risk_overrides={"restart_production_service": "critical"})
protected_tools = wrapper.wrap_tools(tools)
```

## Production Notes

* classify tools by side-effect class (read/write/irreversible)
* enforce `critical` overrides for infrastructure mutation tools
* monitor denied/escalated rates to tune challenge friction