Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden but fails to disclose behavioral traits like whether read-only access is sufficient, what happens if the id is invalid, or if the secret is returned in plaintext. The function name implies read-only, but no explicit behavioral confirmation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.