Tool Registry

# Tool Registry

Provide a catalog of available tools with their capabilities.

## Category
Tool Discovery

## Context
Managing multiple tools in an ecosystem.

## Problem
Agents need to know what tools exist and what they can do.

## Solution
Maintain a tool registry:
- **List all tools**: Names and brief descriptions
- **Categorize**: Group by domain or function
- **Search**: Find tools by capability
- **Metadata**: Required auth, rate limits, etc.

## Example (Python)
```python
@tool
def list_available_tools(
    category: str | None = None
) -> list[ToolInfo]:
    """List all available tools.
    
    Args:
        category: Filter by category (crm, email, calendar)
    
    Returns list with name, description, required_scopes.
    """
    tools = registry.get_all()
    if category:
        tools = [t for t in tools if t.category == category]
    return tools
```

## Considerations
- Include enough detail for tool selection
- Consider versioning as tools evolve
- Return authentication requirements upfront

## Related Patterns
- schema-explorer
- capability-matching
- tool

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Source: https://arcade.dev/patterns/tool-registry