Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, covering the non-mutating behavior. The description adds that it lists dates, limits, and configuration, which is some context about the return content but not a behavioral trait beyond what annotations provide. It does not contradict annotations, and adds marginal context, so a 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.