Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Goes well beyond the annotations: it discloses that the limit is enforced across all file tools, that the OneDrive top level itself becomes inaccessible, that searches are narrowed, that a moved/deleted folder closes the OneDrive, and that changes take effect immediately. That is exactly the consequence-level detail destructiveHint=true hints at but cannot express.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.