# validate_mount_config_proxy_config

> **Function** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/sandbox/_mounts/validate_mount_config_proxy_config)

Reject explicit provider proxy rules owned by mount_config auth.

## Signature

```python
validate_mount_config_proxy_config(
    mount_config: SandboxMountConfig,
    proxy_config: SandboxProxyConfig | None,
) -> None
```

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[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/a39745c67839496a98e5e846122664d8070c8dca/python/langsmith/sandbox/_mounts.py#L475)