Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this as a non-read-only, idempotent, non-destructive operation. The description adds the context that the short description is shown on the profile page, but it does not disclose behaviors such as whether the operation replaces an existing description or how language codes are handled. Given annotation coverage, the description provides modest extra value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.