The body is lean and assumes competence — 'Apply Micronaut validation best practices at HTTP API boundaries' with no padding or basic-concept explanations; every section earns its tokens. The only mild redundancy is 'When to use' echoing the frontmatter triggers, but the body stays efficient.

It gives concrete commands ('./mvnw compile', 'mvn clean verify') and a specific reference file, but no executable code examples live in the body — all code is deferred to the reference, so guidance is concrete but incomplete per the top anchor.

The 4-step Workflow pairs with the Constraints block's explicit checkpoints — MANDATORY compile before, SAFETY stop-on-failure, VERIFY after — forming a clear feedback loop for a build-sensitive operation.

The body is a concise overview pointing to one real, clearly-signaled reference file (references/503-frameworks-micronaut-validation.md, verified present), keeping references a single level deep with easy navigation.

Names many concrete technical surfaces and actions — 'Bean Validation on @Controller methods, @Body @Valid, query/path parameter validation, @ConfigurationProperties validation, custom constraints, nested DTO validation, and ExceptionHandler mapping' — matching the 'lists multiple specific concrete actions' anchor.

It opens with an explicit 'Use when you need to design, review, or improve validation...' clause and adds 'This should trigger for requests such as...', clearly answering both what it does and when to use it.

Trigger phrases like 'Add validation support in Micronaut', 'Review Micronaut validation rules', and 'Improve request validation in Micronaut REST APIs' read as natural user requests with good coverage, matching the top anchor.

The Micronaut-validation niche and 'Part of Plinth Toolkit' framing make it clearly distinguishable from other skills; the validation-only scope is unlikely to trigger for the wrong skill.