Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, and the '[READ]' tag merely duplicates readOnlyHint. The description adds no behavioral context such as pagination, result ordering, required permissions, or whether a nonexistent id errors versus returning an empty list. For a list endpoint of unknown size, this is a thin disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.