Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden and it does disclose the main behaviors: rescanning, schema-change detection, and relationship recalculation. However, it does not state side effects, whether the operation is destructive, whether it persists changes, or what happens when schema changes are actually detected.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.