Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description explicitly labels this as 'WRITE' and states it modifies the Radarr instance, which adds a clear side-effect warning. However, it does not disclose other behavioral traits like whether the operation is a partial or full update, or whether the target profile must already exist. Annotations already indicate readOnlyHint=false, so the description adds only a small amount beyond the structured data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.