Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. 'Approve a review for display' implies a mutation operation that changes review visibility, but it doesn't specify permissions required, whether the action is reversible, side effects (e.g., notifications), or error conditions. For a mutation tool with zero annotation coverage, this leaves significant gaps in understanding the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.