Phase 3: Implement Tool Management & Middleware

Goal

Granular control and extensibility

Tasks

• Database table for tool status (ACTIVE/INACTIVE)
• Per-tool enable/disable in namespaces
• Tool override storage and application
• Tool discovery caching
• Define McpMiddleware trait
• Implement FilterInactiveToolsMiddleware
• Implement ToolOverridesMiddleware
• Add logging and error tracking middleware
• Create middleware composition pattern
• Error status enum for server states
• Structured logging for MCP operations
• Metrics collection (tool call latency, success rates)
• Health endpoint for monitoring

Success Criteria

• Can enable/disable individual tools within namespaces
• Middleware system is extensible
• Tool overrides work (rename/redescribe)
• Comprehensive observability

Timeline

Week 5-6

Depends on: Phase 2

No files, tests, or entry points are named. Start by reviewing the completed Phase 2 work and the existing MCP server structure, then map each task to an implementation area. Done means individual namespace tool controls, extensible middleware and overrides, plus the listed logging, metrics, error-status, and health-monitoring capabilities.