Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide readOnlyHint=false, indicating this is not a read-only operation, which aligns with the conversion action. The description adds no behavioral context beyond what annotations already cover - no information about error handling, performance, or side effects. With annotations present, the bar is lower, but the description doesn't add meaningful behavioral details.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.