Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It mentions downloading a file, implying a read operation, but does not specify if this requires special permissions, affects system state, involves rate limits, or what the output format is (e.g., file content or metadata). This leaves significant gaps in understanding the tool's behavior beyond basic purpose.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.