Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It only says 'Deletes a trace,' which conveys destructiveness but lacks details on whether deletion is permanent, requires specific permissions, or what happens if the trace does not exist. The description adds minimal information beyond the tool name.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.