Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It conveys a read operation via 'Read', but fails to mention potential side effects, permission requirements, error conditions, or the format of returned bytes. The lack of detail about 'decoded' behavior and unsupported regions leaves significant ambiguity.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.