CONF-018: Cacheable results carry ttlMs and cacheScope

Severity	Applies to	Spec section
error	modern era, stdio, http	2026-07-28/server/utilities/caching#cacheable-results

Calls server/discover and, if tools are declared, tools/list. Servers MUST include caching hints on complete results of these operations: ttlMs as an integer >= 0 and cacheScope as public or private.

From the command line: mcpprobe checks explain CONF-018. To leave it out of a run, add "CONF-018" to [checks] disable in mcpprobe.toml; to change how much it counts, use severity_overrides.