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docs: add SIGIL Protocol integration example for custom tools #4561

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docs: add SIGIL Protocol integration example for custom tools
Feb 22, 2026
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docs: remove unvetted third-party sigil protocol endorsement
Feb 22, 2026
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16 changes: 16 additions & 0 deletions docs/en/learn/create-custom-tools.mdx
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Expand Up @@ -34,6 +34,22 @@ class MyCustomTool(BaseTool):
return "Tool's result"
```

#### Securing Custom Tools with SIGIL


You can secure any custom tool by applying the `@sigil_gate` decorator. SIGIL will automatically scan the tool's inputs and outputs against thousands of threat patterns before execution.

```python Code
from crewai.tools import BaseTool
from sigil_protocol.crewai import sigil_gate

@sigil_gate
class CriticalSystemTool(BaseTool):
name: str = "Critical System Access"
description: str = "Executes commands on the critical system."
# ... args_schema and _run implementation ...
```

### Using the `tool` Decorator

Alternatively, you can use the tool decorator `@tool`. This approach allows you to define the tool's attributes and functionality directly within a function,
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