Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only says "Get," which is already implied by the name, and does not mention authentication, permissions, what "class" means in this system, or whether results are paginated/limited. This is a sparse description for a tool operating in an authenticated context, leaving an agent to guess at side effects or constraints.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.