Each tool targets a distinct operation: substring search, incoming call edges, outgoing call edges, and module-level import edges. The only mild overlap is that callers_of and module_deps both answer 'what depends on this', but the symbol-vs-module scoping in the descriptions keeps them separable.

Three different naming patterns coexist: verb_noun (search_symbols), noun_of relations (callers_of, callees_of), and noun_noun (module_deps). Each name is readable and self-explanatory, but the set does not follow a single predictable convention.

Four tools is minimal but well-scoped for a symbol-graph lookup server; every tool covers a distinct query direction with no filler. It sits at the lean end of the acceptable range rather than feeling padded or arbitrarily thin.

The graph traversal surface is coherent (search, callers, callees, imports), but there is no way to fetch a symbol's details, signature, or location, and no file-level or reference-lookup operation. Agents can navigate the graph but will hit dead ends when they need the symbol itself.