Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description only states a simple search action with no behavioral context. It does not disclose whether the tool is read-only, returns a list or single item, supports pagination, or requires any special permissions. Since no annotations exist, the description carries the full burden.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.