Conciseness

Every section instructs rather than explains — no padding, no primer on REST APIs or CELLxGENE itself, no re-stating what Claude already knows. Matches 'Lean and efficient; assumes Claude's competence; every token earns its place'.

Actionability

The body gives a copy-paste-ready executable command with the full JSON payload, two additional common request patterns covering both collection-detail and broad list lookups, exact required/optional field lists, and the success/failure output shape — 'Fully executable; copy-paste ready code or commands; specific examples cover the common cases'.

Workflow Clarity

This is a simple single-task skill (pipe one JSON object into scripts/rest_request.py) and that single action is unambiguous, with a preferred-path ordering (collection detail first, collections list on explicit request). No destructive or batch operations exist that would require validation checkpoints, so the simple-skill exception applies.

Progressive Disclosure

The skill is under 50 lines with clear section headers and no need for external references; the 'References' section explicitly states no additional runtime references are required, and the bundle (scripts/rest_request.py, which is referenced correctly and exists) matches that structure — 'For skills under 50 lines with no need for external references, progressive disclosure can score 5 with just well-organized sections'.

Specificity

"Submit compact CELLxGENE Discover API requests for public collection and dataset metadata" names the domain and one concrete action with a clear target, but stops short of listing several actions (e.g., dataset detail lookups or filtering), matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'.

Completeness

Both parts are present: a clear third-person "what" (submit compact API requests for collection and dataset metadata) and an explicit "Use when a user wants concise single-cell collection summaries" clause. The "when" is somewhat narrow — it only covers collection summaries and misses dataset-related triggers — so it matches anchor 4 rather than the fully concrete trigger coverage of anchor 5.

Trigger Term Quality

Includes natural terms users of this domain would say — "CELLxGENE", "single-cell", "collection", "dataset" — but omits common variations such as "scRNA-seq" or "single cell RNA", fitting 'Good keyword coverage; a few natural terms missing'.

Distinctiveness Conflict Risk

The CELLxGENE Discover API is a clear niche with distinct trigger terms ("CELLxGENE", "single-cell collection summaries"), so it is unlikely to fire for the wrong skill — matching 'Clear niche with distinct triggers; minimal conflict risk'.