Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. The verb 'Read' signals a non-mutating operation, which is a key trait. However, it does not disclose pagination behavior, ordering, error handling, or what exactly 'linked receipt hashes' entails, leaving gaps for a tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.