Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare it is non-read-only, idempotent, non-destructive, and closed-world. The description adds useful behavioral context by naming the verification steps—uploaded object, content signature, session ownership, expiry, and exact application version—before the protected document record is created. It does not describe failure modes or error behavior, but with annotations and an output schema present, this is still solid.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.