Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and network scope are covered. The description adds that the response includes body text, links, images and video embeds, which is useful return-shape context, but with an output schema present this is partly redundant and no auth, rate-limit, or failure behavior is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.