Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description simply states 'list protocol groups', which aligns with the readOnlyHint annotation. It adds no additional behavioral context such as pagination, filtering, or the meaning of protocol groups. However, given the annotation already indicates a safe read operation, the description is not misleading.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.