The body is lean — directives, a compact input/output field reference, and concrete JSON examples — with no padding explaining concepts Claude already knows, so every token earns its place rather than being merely mostly efficient.

Provides a copy-paste bash invocation ('echo {...} | python scripts/rest_request.py'), concrete request JSON for each path type, and specific error codes, meeting the fully-executable/copy-paste-ready anchor rather than the incomplete-pseudocode anchor at 2.

This is a simple single-purpose skill whose single action (submit a request via the script) is unambiguous, so per the simple-skills note it can score 3 without a multi-step workflow; the read-only queries need no validation feedback loop.

Under 50 lines with clearly organized sections (Operating rules, Input, Output, Execution) and a single real bundle reference (scripts/rest_request.py, verified present) rather than nested or unsignaled references.

Lists multiple specific concrete actions — 'prediction, UniProt summary, sequence summary, and annotation lookups' — against a named AlphaFold API domain, matching the score-3 anchor rather than the partial-coverage anchor at 2.

Explicitly answers both what ('Submit compact AlphaFold... API requests for...') and when ('Use when a user wants AlphaFold metadata or concise structure summaries'), satisfying the explicit-trigger requirement that would otherwise cap this at 2.

Natural trigger terms a user of this domain would say appear in the 'Use when' clause ('AlphaFold metadata', 'concise structure summaries') and the capability list (prediction, UniProt), giving good coverage rather than just some relevant keywords.

The AlphaFold Protein Structure Database niche with its own distinct triggers is unlikely to fire for unrelated skills, matching the clear-niche anchor rather than the somewhat-generic anchor at 2.