Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden. 'Get health report' implies a read-only query, and 'rollup per server/DAG' indicates an aggregation behavior. However, it does not disclose output shape, whether all health sets are included by default, or how the rollup is structured, leaving notable gaps for a tool with no annotation safety hints.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.