Conciseness

The 38-line body is lean with no concept explanations Claude already knows, but there is minor redundancy — 'Page with offset instead of asking for large pulls' (Operating rules) repeats 'Keep count modest and page with offset instead of pulling large result sets at once' (Execution behavior). Matches anchor 4 ('efficient; minor instances... that could be trimmed').

Actionability

Fully executable guidance: three exact JSON input patterns and a copy-paste bash command ('echo ... | python scripts/ncbi_gene_clinicaltables.py'), with documented fields verified to match the actual script. Matches anchor 5 ('copy-paste ready code or commands; specific examples cover the common cases').

Workflow Clarity

A simple single-action skill (pipe one JSON object to the script) whose single action is unambiguous, with clear input, output, and error contracts ('Failure returns ok=false with error.code and error.message'). It is a read-only API query, so the destructive/batch validation cap does not apply, and the simple-skill exception holds.

Progressive Disclosure

Under 50 lines with no need for external references — the References section explicitly states none are required — and the one referenced path, scripts/ncbi_gene_clinicaltables.py, exists in the bundle. Sections (Operating rules, Execution behavior, Input, Output, Execution, References) are well organized, matching the simple-skill guideline for a 5.

Specificity

Names the domain (Clinical Tables NCBI Gene) and three concrete actions — 'human gene lookup, pagination, and field selection' — matching anchor 4 ('lists several specific actions; minor gaps in coverage'). Not 5 because output-formatting and raw-save capabilities are unmentioned; not 3 because coverage exceeds 1-2 actions.

Completeness

Both an explicit what ('Submit compact Clinical Tables NCBI Gene requests for...') and an explicit when ('Use when a user wants concise autocomplete-style human gene search results') are present. Not 5 because the when-clause covers only autocomplete-style search while the what-clause also promises pagination and field selection.

Trigger Term Quality

Natural phrases like 'human gene search', 'gene lookup', and 'autocomplete' are present, but common variations users would say — 'gene symbol', 'find gene ID', 'Entrez' — are missing, matching anchor 4 ('good keyword coverage; a few natural terms missing').

Distinctiveness Conflict Risk

A clear niche (Clinical Tables autocomplete-style gene search) with distinct triggers; minor overlap risk remains with a general NCBI/Entrez gene-record skill, which the body (not the description) disambiguates. Matches anchor 4 ('mostly distinct; minor overlap risk with closely related skills').