Conciseness

Lean and efficient — it presents an endpoint, parameter table, response shape, and a worked curl example with no padding or explanation of concepts Claude already knows.

Actionability

Fully executable: a copy-paste curl command, an explicit parameters table with shapes and defaults, a concrete JSON response shape, and a complete error-code list cover the common cases.

Workflow Clarity

For a single GET-request skill the sequence is unambiguous, and the Errors section plus entitlement/auth guidance act as explicit validation checkpoints for the risky (auth-gated, malformed-input) failure paths.

Progressive Disclosure

Well-organized into clearly headed sections (Authentication, Endpoint, Parameters, Response shape, Worked example, Errors) with no nested references and no bundle files needed; navigation is trivial for a single-purpose API skill.

Specificity

Names the domain and several concrete actions — 'Retrieve MFN applied tariff-rate timeseries', 'applied vs bound rates by year', 'the optional US effective tariff rate' — with only minor gaps in coverage.

Completeness

Explicitly answers both 'what' (retrieve MFN applied tariff-rate timeseries, applied vs bound by year, US effective rate) and 'when' ('Use when the user asks how a country's MFN tariffs have changed over time') with concrete trigger phrases.

Trigger Term Quality

Includes a natural trigger phrase ('how a country's MFN tariffs have changed over time') that users would plausibly say, but leans on technical jargon ('MFN applied tariff-rate timeseries') and misses a few common synonyms.

Distinctiveness Conflict Risk

Occupies a clear niche (MFN tariff trends) with distinct, domain-specific triggers and minimal overlap risk against other skills.