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. It states the action ('rebuild') but doesn't explain critical traits: whether this is a destructive operation (e.g., overwrites existing index), requires specific permissions, has performance impacts (e.g., time-consuming), or provides any output/confirmation. This leaves significant gaps for a tool that likely involves system-level changes.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.