Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It discloses the return structure (form name, ID, field definitions) and implies safe read-only operation by listing forms. Lacks explicit mention of no side effects or authentication needs, but sufficient for a simple list operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.