containers

Design and validate new MCP toolsets, tools, and tool changes. Use when planning a new toolset, adding tools to an existing toolset, reviewing a toolset PR, or deciding whether a new tool is warranted. Covers the full lifecycle: eval-first validation, tool design methodology, consolidation patterns, and review criteria.

Use when a Playwright E2E test fails and you have a trace archive to investigate. Optionally accepts a GitHub Actions pipeline link for additional CI context. Runs non-interactively.