Modern-lane result decoration — the framework defaults every modern result carries, with zero consumer surface.

complete_result/2 stamps resultType: "complete" — the only result type in the modern core; MRTR's "input_required" and the tasks extension's "task" arrive with planned changes — and the io.modelcontextprotocol/serverInfo result _meta (built by Wymcp.ServerInfo from the :server_info router option and app config). with_cache_hints/3 merges the cache-hint defaults into the two cacheable modern results:

"private" is the never-wrong scope: the spec allows tool sets to vary by authorization context, so "public" could silently become wrong for a future consumer. Both results change only at deploy/upgrade, so minutes of staleness is harmless; the values are revisable without consumer churn.

Both functions are era-guarded no-ops on a legacy conn, so the shared serving methods (Wymcp.Methods.ToolsList, Wymcp.Methods.ToolsCall) pipe through them unconditionally.