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 safety profile. The description adds value by mentioning the disambiguation of homonymous plans, a behavioral trait not in the annotations. However, it does not disclose potential result variations, such as multiple exam sessions per subject, or any permission requirements. With annotations covering the core traits, this is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.