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. 'Delete a database' implies a destructive, irreversible mutation, but the description fails to disclose critical behavioral traits: whether deletion is permanent, if it requires specific permissions, what happens to associated data/connections, or any confirmation prompts. 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.