Evaluate MCP Tools Tool descriptions are prompt engineering — they land directly in Claude's context window and determine whether Claude picks the right tool with the right arguments. This skill makes tool quality measurable and improvable instead of guesswork. Three levels of testing, each building on the last: 1. Static Analysis — deterministic schema quality checks (no Claude calls) 2. Selection Testing — does Claude pick the right tool for each intent? 3. Description Optimization — iterative improvement based on confusion patterns When to Apply - User wants to check if their MCP tool sche…