Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits. It only says 'Create a saved search', omitting details like side effects, success conditions, error handling, or required permissions. The existence of an output schema is not leveraged to explain return behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.