Scored across 6 tools
The draft vs kept split is spelled out explicitly in each description (#d= vs #k=), so read_trip_link/read_kept_trip and amend_trip_link/add_to_kept_trip are reasonably distinguishable. There is still some inherent overlap between the two read tools and the two modify tools, but the descriptions resolve it.
All names are snake_case verb_noun, which is a clean, predictable pattern. The only wrinkle is that the noun shifts between 'trip_link' (build/amend/read) and 'kept_trip' (read/add), which is a minor deviation rather than a real inconsistency.
Six tools is well-scoped for a trip-link server: geocode, build, amend, read-draft, read-kept, add-to-kept. Each tool maps to a distinct operation and none feels redundant or missing from the count perspective.
Draft lifecycle is largely covered (build/amend/read, with amend able to drop legs). But there is no tool to create or convert a trip into a kept trip despite a whole family of kept-trip tools, and kept trips can only have a stop added—no rename, remove, or field edits.