Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide useful information (non-readOnly, non-destructive, non-idempotent, openWorld), but the description adds minimal behavioral context. It doesn't explain what 'rebuild' entails operationally - whether it recreates containers, resets data, reconfigures settings, or causes downtime. However, it doesn't contradict the annotations, and the POST method hint suggests a mutation operation consistent with readOnlyHint=false.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.