Conciseness

Mostly efficient high-value tool documentation, but with noticeable repetition: 'CPIC_get_drug_info' is fully documented in both Phase 0 and Phase 2, 'PharmGKB_get_dosing_guidelines' appears in both Phase 2 and Phase 5, and the caveat that 'CPIC_search_gene_drug_pairs returns RxNorm IDs, not drug names' appears three times (Phase 1, Key Parameter Notes, Limitations). The Key Parameter Notes and Limitations sections substantially restate the Gotchas section, and the active-vs-prodrug metabolizer explanation covers pharmacology Claude already knows. This fits anchor 3 (mostly efficient but could be tightened) better than 4, where over-explanation would be only minor.

Actionability

Fully concrete guidance: exact tool names with parameter types ('guideline_id (integer) OR drug/drug_name (string)'), expected response shapes ('{status, data: {guideline_id, recommendations: [...], count}}'), copy-paste-ready calls ('CPIC_get_recommendations(drug="codeine", limit=50)'), and three worked example workflows (drug-first, gene-first, variant-first) covering the common cases. Matches anchor 5; not 4 because no significant execution detail is missing.

Workflow Clarity

A clear six-phase pipeline starting with explicit disambiguation, a 4-step reasoning checklist ('Does a CPIC guideline exist... What is the patient's phenotype...'), and a Fallback Strategies section covering ~8 failure modes (e.g., 'CPIC_get_recommendations returns 0 rows -> Check if algorithm-based (warfarin)'). Error-recovery loops are strong, but output-verification checkpoints are implicit in fallbacks rather than explicit validation steps, which fits anchor 4 better than 5.

Progressive Disclosure

Well-sectioned with clear phase headers, but ~200 lines of per-tool API reference (parameters, response schemas, and gotchas for ~25 tools) are inlined in SKILL.md — content that clearly belongs in a references/ file per the rubric. No bundle files exist (no references/, scripts/, or assets/ directories), so the skill is a single well-organized but oversized document. Fits anchor 3 (some structure, content that should be separate is inline); not 2 because section organization and navigation within the file are good, not minimal.

Specificity

Multiple specific concrete actions with named resources: 'CPIC dosing guidelines', 'variant-drug-response associations', 'metabolizer-status scoring', 'CYP/HLA pharmacogenomic allele interpretation', and 'clinically-actionable PGx report generation' — covering retrieval, interpretation, scoring, and output. Comprehensive with no meaningful gap, matching anchor 5 rather than 4.

Completeness

Explicitly answers both: what — 'drug-gene interactions (CPIC, PharmGKB), CPIC dosing guidelines, variant-drug-response associations... metabolizer-status scoring' — and when — 'Use for PGx-informed dosing recommendations, CYP/HLA pharmacogenomic allele interpretation, and clinically-actionable PGx report generation.' Concrete trigger phrases with both what and when present, matching anchor 5.

Trigger Term Quality

Good natural-term coverage: 'Pharmacogenomics (PGx)' with both full term and abbreviation, 'CPIC dosing guidelines', 'dosing recommendations', 'metabolizer'. A few natural synonyms are missing (e.g., 'pharmacogenetics', 'star allele', 'poor/ultrarapid metabolizer'), which fits anchor 4 rather than 5; clearly above anchor 3 because the terms present are exactly what users in this domain say.

Distinctiveness Conflict Risk

Clear niche (pharmacogenomics) with distinct triggers — 'CPIC', 'PharmGKB', 'CYP/HLA pharmacogenomic allele', 'PGx' — that no other plausible skill would claim. Minimal conflict risk, matching anchor 5.