prowler-mcp Skill | Agent Skills

Overview

The Prowler MCP Server uses three sub-servers with prefixed namespacing:

| Sub-Server | Prefix | Auth | Purpose | |------------|--------|------|---------| | Prowler App | prowler_app_* | Required | Cloud management tools | | Prowler Hub | prowler_hub_* | No | Security checks catalog | | Prowler Docs | prowler_docs_* | No | Documentation search |

For complete architecture, patterns, and examples, see docs/developer-guide/mcp-server.mdx.

Critical Rules (Prowler App Only)

Tool Implementation

ALWAYS: Extend BaseTool (auto-registered via tool_loader.py, only public methods from the class are exposed as a tool)
NEVER: Manually register BaseTool subclasses
NEVER: Import tools directly in server.py

Models

ALWAYS: Use MinimalSerializerMixin for responses
ALWAYS: Implement from_api_response() factory method
ALWAYS: Use two-tier models (Simplified for lists, Detailed for single items)
NEVER: Return raw API responses

API Client

ALWAYS: Use self.api_client singleton
ALWAYS: Use build_filter_params() for query parameters
NEVER: Create new httpx clients

Hub/Docs Tools

Use @mcp.tool() decorator directly—no BaseTool or models required.

Quick Reference: New Prowler App Tool

Create tool class in prowler_app/tools/ extending BaseTool
Create models in prowler_app/models/ using MinimalSerializerMixin
Tools auto-register via tool_loader.py

QA Checklist (Prowler App)

[ ] Tool docstrings describe LLM-relevant behavior
[ ] Models use MinimalSerializerMixin
[ ] API responses transformed to simplified models
[ ] Error handling returns {"error": str, "status": "failed"}
[ ] Parameters use Field() with descriptions
[ ] No hardcoded secrets

Resources

Full Guide: docs/developer-guide/mcp-server.mdx
Templates: See assets/ for tool and model templates

Agent Skills: prowler-mcp

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