The content is reasonably efficient but includes some unnecessary explanation that Claude would already know (e.g., explaining what 401/403/404 mean, basic concepts like 'XSS attempts blocked'). The structure is good but could be tightened.

Provides concrete, executable curl commands with expected outputs for each testing phase. The examples are copy-paste ready and cover specific scenarios with clear expected results.

Clear 4-step sequential workflow with explicit ordering (Infrastructure → Security → Validation → Functionality). The troubleshooting section provides a decision tree for debugging, and the 'Test in order' best practice reinforces the validation checkpoint approach.

Content is well-organized with clear sections and headers, but it's a monolithic document that could benefit from splitting detailed test cases into separate reference files. No external references are provided for deeper topics like automated test examples.

The description uses vague language ('test or debug API endpoints systematically') without listing any concrete actions like 'send requests', 'validate responses', 'check status codes', or 'inspect headers'.

The description only addresses 'when' (framed as a trigger) but completely lacks the 'what' - it never explains what capabilities or actions the skill provides. This inverts the typical problem but still fails completeness.

Contains some relevant keywords ('test', 'debug', 'API endpoints') that users might say, but misses common variations like 'REST', 'HTTP requests', 'curl', 'postman', 'API calls', or specific verbs like 'hit an endpoint'.

The API testing domain is somewhat specific, but 'test or debug' is broad enough to potentially conflict with general debugging skills, testing frameworks, or other API-related skills without clear differentiation.