Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds valuable behavioral context by explaining that the abstract may be returned with structured sections (background, methods, results, conclusions) or unstructured, depending on the journal. This goes beyond what annotations provide, though it does not mention rate limits or authentication.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.