Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description does carry the key burden of disclosing the cascade ('and its taggings') and labels the operation as mutating Feedbin state. It does not say whether the deletion is reversible, what happens if the tag is absent, or what a successful response looks like — meaningful gaps for an irreversible destructive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.