Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description alone must disclose behavior. 'Get all CDPs' implies a read-only query, but it does not mention pagination even though the schema includes limit/offset, nor does it describe the response shape or potential scale/cost of fetching all CDPs. No contradiction exists, but meaningful behavioral context is missing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.