Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Despite already having readOnlyHint, idempotentHint, and destructiveHint annotations, the description adds meaningful behavioral context: the wiki is public and requires no auth, the response contains only summaries with specific fields, bodies are excluded, and total represents the filtered set size safe for pagination. This goes beyond the annotations and helps the agent set correct expectations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.