The 1882-line mod.rs is split into:
- tools_list.rs: handle_tools_list — the static schema for every MCP tool (1172 lines)
- dispatch.rs: handle_tools_call — the tool-name → *_tools router (157 lines)
- mod.rs: doc, sub-mod decls, JsonRpc structs, Poem handlers, handle_initialize (586 lines)
Tests stay co-located with the code they exercise.
No behaviour change. All 267 http::mcp tests pass; full suite green
(2635 tests with --test-threads=1).
dave