Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. The verb 'Get' honestly signals a read-only operation, and 'current' plus 'per collateral asset' convey that the result is a fresh, multi-entry price set rather than a single number. However, it does not disclose the return shape, units, freshness guarantees, or behavior for unsupported assets, though the absence of those is less critical for a simple getter.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.