Conciseness

The body is dense with provider-specific contract details and explains nothing Claude already knows (no MCP/DOI primers), so it mostly assumes competence. It stays at 4 rather than 5 because of minor trimmable instances — the npm-wrapper digression ("The published bgpt-mcp 1.1.0 npm package is a thin SSE wrapper..."), repeated quota/error caveats across "Search and DOI lookup" and "Allowance and review scope", and time-stamped version/date facts ("BGPT 2.14.7", "reviewed on 2026-09-30") sprinkled outside any deprecation-style section. Not a 3 because there is no padded or unnecessary concept explanation.

Actionability

Guidance is fully concrete and executable: a copy-paste "mcpServers" JSON config with exact endpoints, an argument-contract table for every tool parameter, and three example payloads covering the common cases (basic search, filtered search, DOI lookup), plus specific fields to inspect ("central_claim and evidence.evidence_units", "extraction_status, normalization_warnings, and evidence.record_provenance"). Not a 4: the examples cover the common cases and the config is copy-paste ready, matching the 5 anchor for an instruction-only skill.

Workflow Clarity

Sections follow the real usage sequence (Connect → Search and DOI lookup → Read the result contract → Evidence checks → Allowance) and most validation checkpoints are explicit: "Inspect the MCP result for tool errors before interpreting the envelope", "handle not-found before reading it", "Check extraction_status, normalization_warnings... before synthesis", "Recheck the allowance and pricing before a large batch", and "Do not repeatedly retry a quota-exhausted request". Not a 5 because the sequence is implied by section order rather than an explicit ordered workflow, and validation guidance is distributed in prose rather than a checklist with fix-and-retry feedback loops.

Progressive Disclosure

The actual bundle is a single SKILL.md with no references/, scripts/, or assets/ directories, and the body has clean, well-ordered section headers with external links clearly cited — good structure with content mostly appropriately placed inline. Not a 5: at ~147 lines, secondary content such as the outdated-npm-package warning and host/bridge connection details could live in a separate reference file per the progressive-disclosure rationale; not a 3 because there is no large block of content that clearly belongs elsewhere and navigation is easy.

Specificity

The description enumerates multiple concrete actions — "Searches BGPT scientific papers by topic or DOI and retrieves claim-level evidence extracted from full text, including experiments, reported statistics, scope, limitations, and provenance" — covering search modes (topic, DOI) and the retrieved evidence fields comprehensively. This matches the 5 anchor (multiple specific concrete actions, comprehensive coverage); it is not a 4 because there are no notable gaps in the capability coverage.

Completeness

It explicitly answers both questions: what ("Searches BGPT scientific papers by topic or DOI and retrieves claim-level evidence...") and when ("Use for literature reviews, evidence synthesis, and finding experimental details beyond abstracts") with concrete trigger phrases. This matches the 5 anchor exactly; a 4 would require the 'when' clause to be less explicit, which it is not.

Trigger Term Quality

Natural phrases users would say are present: "scientific papers", "DOI", "literature reviews", "evidence synthesis", "finding experimental details beyond abstracts". Not a 5 because a few natural terms and synonyms users commonly say are missing (e.g., "full text", "studies", "citations", plain "papers"); not a 3 because the present keywords are relevant, natural, and well-covered rather than merely "some".

Distinctiveness Conflict Risk

The niche is mostly distinct — "BGPT scientific papers", "DOI", "claim-level evidence" beyond abstracts — but the 'when' triggers "literature reviews" and "evidence synthesis" are broad enough to also fire for other literature-search skills, giving minor overlap risk. Not a 5 because of that overlap with generic research/synthesis skills; not a 3 because the BGPT/claim-level-evidence niche is far more specific than anchor-3 style overlap.