Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this a safe, idempotent, read-only, closed-world operation, so the safety profile needs no restatement. The description adds content-level context (results are ranked by linked bibliography records and include ISSN and catalogue links) that is not in the annotations, which is helpful given there is no output schema. It stops short of noting pagination, ordering stability, or empty-result behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.