Conciseness

The body is lean and imperative throughout: a seven-step procedure, boundary rules, and an output contract, with zero explanation of concepts Claude already knows ("Collect business objective, account age, date window, timezone, currency, spend, conversion definition"). Every token earns its place; the only wordiness is the functional path-resolution parenthetical in step 3, which keeps it at anchor 5 rather than revealing padding.

Actionability

Mostly executable instruction-style guidance: a concrete input checklist, a named reference file ("ads/references/pinterest-audit.md"), named control areas, and a schema-validity requirement. Not 5 because "relevant shared measurement, benchmark, creative, policy, and scoring references" and "the common JSON contracts" are unnamed with no paths; not 3 because the given guidance is specific and executable with only minor gaps.

Workflow Clarity

The seven steps are clearly sequenced (read contract, collect inputs, read reference, normalize, evaluate, return findings, render report) with guardrails like "Evaluate only applicable controls" and "Keep all account changes as drafts until the main mutation gate passes". Not 5 because validation checkpoints are implicit ("schema-valid findings" states an expectation but no validate-and-fix loop); the read-only audit nature means the destructive-operation cap does not apply.

Progressive Disclosure

Well-organized sections (Procedure, Boundaries, Output) under 50 lines, with one clearly signaled one-level-deep reference and explicit path-resolution instructions for it. Not 5 because the "shared measurement, benchmark, creative, policy, and scoring references" are mentioned without names or paths, leaving a minor navigation gap.

Specificity

Enumerates nine concrete audit areas ("measurement, Pinterest Tag and Conversions API, catalog and shopping readiness, visual creative, audiences, Performance+ intent, budgets, brand safety, and reporting") which is comprehensive coverage, but it rests on a single verb "Audit" rather than multiple distinct actions. Not 5 because action variety is limited to auditing; not below 4 because the enumerated areas are specific and concrete rather than generic.

Completeness

Clearly answers both questions: the "what" is a concrete audit across nine named areas, and the "when" is an explicit "Use for Pinterest Ads, promoted Pins, shopping ads, catalog sales, Pinterest Tag, Pinterest Conversions API, or Pinterest Performance+" clause with concrete triggers. This matches the anchor-5 example structure exactly, so it is not 4 (the when-clause is fully explicit, not merely adequate).

Trigger Term Quality

The explicit trigger list "Pinterest Ads, promoted Pins, shopping ads, catalog sales, Pinterest Tag, Pinterest Conversions API, or Pinterest Performance+" comprehensively covers the natural phrases and synonyms (promoted Pins, shopping ads, catalog sales) a user would say when needing this skill. Not 4 because no meaningful natural term for the domain is missing.

Distinctiveness Conflict Risk

The description occupies a clear Pinterest-only niche and every trigger term is Pinterest-specific, so it is unlikely to fire for a sibling platform skill (e.g., a generic ads or other-platform skill). Minimal conflict risk, matching anchor 5; not 4 because there is no meaningful overlap surface.