Conciseness

The body is short and sectioned, but there is clear redundancy: the opening line 'Structured data enables rich snippets with stars, prices, images, and FAQ dropdowns in search results—significantly increasing click-through rates' is repeated nearly verbatim as the first Quick Reference bullet, and the 'Explain' section re-states the same idea. It matches 'Mostly efficient but includes some unnecessary explanation or could be tightened'; not 4 because the duplication is a visible trim candidate, not a minor one.

Actionability

'Check for JSON-LD, Microdata, or RDFa markup' and 'Validate with Google Rich Results Test' name concrete tools/formats, but the Fix section is abstract ('Add appropriate Schema.org structured data... based on its content type') with no example markup or commands in the body — the executable JSON-LD example lives only in references/rule.md. This matches 'Some concrete guidance but incomplete; missing key details'.

Workflow Clarity

The Check → Fix → Explain → Code Review sections give a recognizable sequence, and 'Validate with Google Rich Results Test' hints at verification, but no explicit validation checkpoint (e.g. 'validate after adding markup') or error-recovery loop appears in the body. This matches 'Steps listed but validation gaps; sequence present but checkpoints missing or implicit'; not 4 because the validation step is a bullet in Quick Reference rather than an ordered checkpoint.

Progressive Disclosure

The body is a concise overview with clear sections, and detailed material is pushed to a single, real, one-level-deep reference ('see references/rule.md', verified to exist and contain the implementation details and code example), clearly signaled at the end. This matches the 'Clear overview with well-signaled one-level-deep references' anchor.

Specificity

The description names the SEO/structured-data domain and one concrete action ('Verify the rendered HTML and HTTP response rather than relying only on source files') but the core capability is only implied through the phrase 'related to Add structured data markup', which reads as a rule title rather than an action. It matches the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'; a 4 would require several specific listed actions, which the text does not provide.

Completeness

The 'when' is explicit ('Use when auditing metadata, crawlability, structured data, or indexability'), but the 'what' is weak: the only forward-looking capability stated is 'Verify the rendered HTML and HTTP response', and 'related to Add structured data markup' does not state what the skill actually does (check/fix/explain structured data). It sits between the 'only when present without what' (2) and 'both present, when could be more specific' (4) anchors, closer to the midpoint but not clearly at 4.

Trigger Term Quality

'auditing metadata, crawlability, structured data, or indexability' gives good natural-keyword coverage of terms an SEO-minded user would say, comparable to the 'PDF files, forms, document extraction' anchor. It misses common variations like 'schema.org', 'JSON-LD', 'rich snippets', or 'rich results', so it does not reach the 5 anchor's comprehensive synonym coverage.

Distinctiveness Conflict Risk

'structured data' is a distinctive niche term, but 'auditing metadata, crawlability, or indexability' is broad SEO territory that would also naturally trigger sibling SEO audit skills (meta-tag rules, crawlability rules), matching 'Somewhat specific but could still overlap with similar skills'. It does not reach 4 because the trigger set is not narrowly scoped to structured data.