Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description was expected to carry behavioral disclosure. It only states 'List product groups/folders' and adds no detail about pagination behavior, ordering, filtering limitations, permissions, or whether archived/inactive groups are included. The schema's limit/offset parameters imply pagination but the description itself is silent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.