Conciseness

The body is compact and mostly on-task, but the Google-rewrites-snippets rationale is stated three times ("Google ignores them and generates its own snippet" in the intro, "Google may auto-generate snippets when descriptions are duplicated or missing" in Quick Reference, and the whole "Explain" section: "Duplicate meta descriptions tell Google the pages are interchangeable..."), which is SEO knowledge Claude already has. This matches the 3 anchor of mostly efficient with some unnecessary explanation; not a 2 because each redundant passage is brief and there is no heavy padding.

Actionability

Concrete guidance throughout: the exact tag to scan ("<meta name=\"description\" content=\"...\">"), explicit flagging criteria ("description value that appears on more than one URL", "matches the site tagline"), a character budget ("50–160 characters"), named frameworks and tools ("Next.js/React... dynamic description prop", "Yoast, RankMath"), and two example descriptions. It misses the 5 anchor because the Check section gives no executable method for scanning every page (no crawl command or tool in the body — those live only in references/rule.md).

Workflow Clarity

A coherent Check → Fix → Code Review sequence is present, and the Code Review section supplies a verification checkpoint ("Check that no two <meta name=\"description\"> tags... share identical content values", "Confirm the description is set dynamically per route"). The site-wide scan is a batch operation but validation is not missing, so no cap applies; it falls short of 5 only because there is no explicit re-check feedback loop after fixes are applied.

Progressive Disclosure

The ~35-line body is a clean overview with well-labeled sections (Quick Reference, Check, Fix, Explain, Code Review) and a clearly signaled one-level-deep reference: "For full implementation details, code examples, and framework-specific guidance, see references/rule.md". The bundle matches — references/rule.md exists, contains exactly the promised code examples and framework detail, and introduces no nested local references, matching the 5 anchor for clear overview with well-signaled one-level-deep references.

Specificity

The description lists three concrete actions — "auditing a site's meta tag uniqueness", "generating page-specific meta descriptions", "reviewing CMS templates that inject the same description globally" — matching the anchor for several specific actions with minor gaps. It falls short of the 5 anchor because core capabilities like detecting/fixing duplicate description tags across URLs are only implied by the oblique phrase "meta tag uniqueness", and it lacks a 5-level comprehensive action inventory.

Completeness

It has an explicit "Use when..." clause (avoiding the cap at 3), and the "what" is conveyed through the embedded actions (auditing, generating, reviewing CMS templates). It stops short of the 5 anchor because no declarative capability statement precedes the trigger clause — what the skill does must be inferred from the when-clauses rather than stated directly (e.g., "Detects and fixes duplicate meta descriptions...").

Trigger Term Quality

Natural user phrases are present ("auditing", "meta tag", "meta descriptions", "CMS templates"), giving good keyword coverage per the 4 anchor. It misses the most natural trigger phrasing a user would say — "duplicate meta descriptions" — as well as common synonyms like "SEO" or "search snippet", so it does not reach the comprehensive 5 anchor.

Distinctiveness Conflict Risk

The description occupies a clear niche (meta description uniqueness) and is written in acceptable third-person/trigger form, fitting the 4 anchor of mostly distinct with minor overlap risk. It doesn't reach 5 because the broader phrase "meta tag uniqueness" and the CMS-review scenario could also pull in closely related skills such as meta-title, og-tag, or general SEO-audit skills.