Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds genuinely behavioral detail beyond that: the cursor is 24 characters, paging moves toward older commentary, and the full feed may contain zero-filled IDs. It does not mention rate limits or auth, but the added operational context is substantial.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.