Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=false, idempotentHint=true, destructiveHint=false, and openWorldHint=true. The description adds meaningful context by stating profiles are self-asserted during alpha and discoverable, which clarifies verification and visibility. It does not explicitly describe update semantics, but the title and idempotent hint cover much of that.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.