Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate readOnlyHint=false, idempotentHint=true, and destructiveHint=false. The description adds the useful fact that it 'Returns folder metadata,' but does not disclose other behavioral details such as error handling when the path exists or permission requirements. Since annotations cover the safety profile, this is acceptable but not exceptional.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.