Conciseness

The body is lean and operational — rules, endpoint paths, exact JSON field lists, and a ready-to-run command — but the example JSON in 'Input' is duplicated verbatim in the 'Execution' bash command, and rules like 'Treat displayed ... as UI truncation' are marginal. Efficient with minor trimmable instances, matching anchor 4 rather than the every-token-earns-its-place anchor 5.

Actionability

Fully executable guidance: exact script path ('scripts/rest_request.py'), base URL, four concrete endpoint paths, two complete request JSON examples, and a copy-paste bash command covering the common cases. Matches anchor 5.

Workflow Clarity

The single-task flow (build request from the given patterns, run the script, summarize or save raw) is unambiguous, and success/failure output structure is documented ('Failure returns ok=false with error.code and error.message'). It falls short of anchor 5 because the flagged edge case — 'some empty-result cases may still return an empty body' — has no explicit recovery step. No batch/destructive cap applies since these are read-only lookups.

Progressive Disclosure

Under 50 lines with no need for external references, and the 'References' section explicitly states none are required — which matches the actual bundle (only SKILL.md and scripts/rest_request.py, and the script exists). Sections are well organized, so per the simple-skill guideline this matches anchor 5.

Specificity

Names the domain and several concrete actions — 'ligand-target binding lookups by PDB, UniProt, or similarity search' and 'save raw payloads only on request' — with minor gaps (no mention of affinity data types like Ki/IC50). It is above anchor 3 (more than 1-2 actions) but below anchor 5 because coverage is not comprehensive.

Completeness

Explicitly answers both: what — 'Submit compact BindingDB REST API requests for ligand-target binding lookups' — and when — 'Use when a user wants concise BindingDB summaries'. The when-clause is present and explicit but thinner than anchor 5's multiple concrete trigger phrases, so it sits at anchor 4.

Trigger Term Quality

Good natural keywords — 'BindingDB', 'binding', 'PDB', 'UniProt', 'similarity search', 'summaries' — but misses common variations users would say such as 'binding affinity', 'Ki', 'IC50', or 'drug-target'. Above anchor 3 (synonyms present, not just domain name) but not the comprehensive coverage of anchor 5.

Distinctiveness Conflict Risk

'BindingDB' plus the specific lookup modes (PDB, UniProt, similarity) define a clear niche with distinct triggers and minimal conflict risk with other skills. Clearly matches anchor 5; no overlap concerns.