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, and it discloses only the return scope ('tool folders and counts') and a usage hint. It does not mention the optional include_tools behavior, what the counts represent, or any implications of calling it, leaving the agent to guess at the tool's full behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.