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

# AL0129 - Loom tool should declare its side effect

> Every Loom tool should declare its side effect via [ToolSideEffect] on the method or containing type so that governance policies can be enforced automatically

Source: [AL0129ToolMustDeclareSideEffectAnalyzer.cs](https://github.com/ANcpLua/ANcpLua.Analyzers/blob/main/src/ANcpLua.Analyzers/Analyzers/AL0129ToolMustDeclareSideEffectAnalyzer.cs)

## Description

Every Loom tool should declare its side effect via \[ToolSideEffect] on the method or containing type so that governance policies can be enforced automatically.

## Properties

* **Category**: GenAI
* **Severity**: Info
* **Enabled by default**: True
* **Code fix available**: False

## Configuration

```editorconfig theme={null}
dotnet_diagnostic.AL0129.severity = info
```