Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral context — sort order (newest first) and the shape of returned fields (slug, título, descripción, fecha, URL) — but says nothing about pagination behavior, default page size, or result caps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.