Conciseness

The body is short and mostly efficient, but the 'Check' and 'Code Review' sections repeat nearly identical instructions (fetch sitemap URLs, look for the noindex meta tag / X-Robots-Tag header, report matches), and the 'Explain' section spells out concepts Claude already knows ('The XML sitemap is a recommendation to search engines: please crawl and index these pages'). This fits 'mostly efficient but includes some unnecessary explanation or could be tightened' better than the lean 5 or 4 anchors.

Actionability

Concrete, executable guidance for an instruction-only skill: exact directives to look for (<meta name='robots' content='noindex'> and X-Robots-Tag: noindex), a clear decision rule for the fix ('If yes — remove the noindex directive. If no — remove the URL from the sitemap'), and an extra check for non-200 sitemap entries. Minor gaps (no curl/fetch command examples) keep it below the fully copy-paste-ready 5 anchor.

Workflow Clarity

The audit sequence (fetch sitemap → check each URL for both noindex signals → report) and the fix decision path are unambiguous, and the simple-skill exception applies since this is a single task under 50 lines. However, the duplicated Check/Code Review sections and the absence of any verification step for the remediated sitemap leave minor validation gaps, matching the 4 anchor rather than 5.

Progressive Disclosure

The body is a lean, well-sectioned overview (Quick Reference, Check, Fix, Explain) with a clearly signaled one-level-deep pointer to 'references/rule.md', which exists in the bundle and holds the implementation details, code examples, and decision tree. This matches the simple-skill exception and the clear-overview 5 anchor.

Specificity

The description names the domain and one or two concrete actions ('auditing an XML sitemap', 'diagnosing indexing issues') but never states what the skill actually does (detect/report noindexed URLs in the sitemap); the checking action is only implied by the applicability clause. It sits between the vague score-2 anchor and the comprehensive score-4 anchor, matching the '1-2 concrete actions' anchor best.

Completeness

An explicit 'Use when...' clause covers 'when' clearly, and 'what' is present via 'auditing an XML sitemap or diagnosing indexing issues', matching the anchor 'has both what and when; when could be more explicit or specific' — the what-side (reporting contradictory noindex/sitemap entries) stays implicit rather than concrete. Not a 5 because the what is not stated as an action with concrete trigger phrasing; not a 3 because the when clause is explicit.

Trigger Term Quality

Good natural keyword coverage: 'auditing an XML sitemap', 'diagnosing indexing issues', 'noindex meta tags', 'X-Robots-Tag headers'. A few common user phrasings are missing (e.g., 'SEO audit', 'Google indexing', 'crawl budget', 'robots'), so it does not reach the comprehensive synonym/extension coverage of the 5 anchor.

Distinctiveness Conflict Risk

A clear niche (noindex directives on sitemap-listed URLs) with distinct triggers, mostly distinguishable from generic SEO skills; minor overlap risk with adjacent rules like robots-meta or indexability-conflicts checks, which keeps it below the minimal-conflict 5 anchor.