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 but fails completely. 'Delete Post' implies a destructive mutation but doesn't specify whether deletion is permanent or reversible, what permissions are required, whether there are rate limits, what happens to associated data, or what the response looks like. For a destructive operation with zero annotation coverage, this is dangerously inadequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.