CommonRig

Each tool targets a distinct intent: describe the kit, quote a tier, produce a purchase URL, fetch the free sample, validate a doctor bundle. The only soft overlap is kit_describe vs kit_quote, since describe also surfaces prices while quote drills into one tier — descriptions do flag the difference, but an agent could pick the wrong one for a pricing question.

All names are snake_case verb phrases and the kit_* family is readable, but the set mixes two prefixes (kit_ vs doctor_) and applies an _x402 suffix inconsistently — kit_buy_x402 and doctor_check_x402 carry it while kit_quote, which also returns USDC/x402 terms, does not. The suffix therefore misleads about which tools are x402-related.

Five tools is a tight, well-scoped surface for a single commercial product (describe, quote, buy-link, sample, bundle check) with no redundant entries. It sits at the low end of the typical 3-15 range, but nothing feels padded or missing at the count level.

The informational and pre-purchase lifecycle is covered, but the surface dead-ends after purchase: kit_buy_x402 only returns a URL, and there is no tool to check order status, retrieve the purchased kit/updates entitlement, or verify a completed x402 payment. Similarly, doctor_check_x402 validates a bundle with no tool to produce one, leaving notable gaps agents must work around manually.