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. 'Submit for indexing' implies a write operation, but the description doesn't disclose rate limits, authentication requirements, whether this is asynchronous, what happens on success/failure, or how it differs from similar tools. This leaves significant gaps for an agent to understand 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.