Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the burden of behavioral disclosure. It only says 'List price lists' and does not mention read-only behavior, pagination behavior, or what is returned. The name implies a read operation, but the description adds no explicit behavioral information.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.