Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of disclosing behavior. It communicates that the tool returns the complete, unfiltered set of armors, implying a read-only operation. However, it omits any details about return format, pagination, or potential errors, so behavioral transparency is limited.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.