Tools are mostly distinct in purpose: inventory summarizes the index, search finds candidates, recommend provides ranked suggestions, and explain returns metadata. However, search_skills and recommend_skills overlap notably in that both surface candidate skills for a task, with the difference (scored candidates vs. categorized recommendations) subtle enough that an agent could misselect. inventory_skills and explain_skill also both touch metadata/duplicate info.

All four tools follow a consistent verb_noun pattern (inventory, search, recommend, explain) that is clear and readable. The verbs are varied but each communicates a distinct action well, and the noun 'skills' is consistent. Minor inconsistency: 'inventory' as a verb is slightly unconventional vs. the more standard 'list', but the pattern remains coherent.

Four tools is a reasonable, focused count for a skill-routing server whose purpose is discovery/indexing/advisory. Each tool earns its place covering distinct stages of the workflow. Could arguably be slightly slim, but it's well-scoped and not overly heavy.

The surface covers indexing, searching, recommending, and explaining skills, which covers the core discovery workflow well. However, there's no tool for skill management operations (e.g., installing, removing, or updating skills), and no filter-by-category listing tool—gaps that agents might hit when they need to act on skills rather than just discover them. Still, for a routing/advisory purpose the surface is largely complete.