Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description mentions the official register and the returned fields, giving insight into the tool's behaviour. However, it does not disclose details like case sensitivity, partial matching, or whether both name and postcode can be combined, but for a simple lookup it is adequate given no annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.