Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations only include destructiveHint: false, which is minimal. The description adds 'append' semantics and a non-destructive feel, but doesn't clarify side effects, idempotency, or whether it updates other state. Without a readOnlyHint, the write nature is clear from the verb but no deeper behavior is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.