Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of indicating behavior. 'Get' implies a read-only, idempotent operation, which is useful. However, it does not disclose authentication requirements, behavior for missing or invalid IDs, error responses, or response format, leaving meaningful gaps for a tool with no annotation support.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.