Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, yet it only says 'Retrieves a list of trace requests.' It does not disclose any details about scope, response shape, pagination, or side effects. The optional 'user' parameter is not tied to behavior, so the tool's actual behavior remains opaque.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.