Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full responsibility for disclosing behavioral traits. It only states 'Your VIA Points balance' and explains points domain properties, but fails to explicitly state that this is a read-only operation, what the return format is, or any error handling behavior. The name 'get' implies read-only, but the description adds no transparency beyond that.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.