Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With annotations covering readOnlyHint=true, idempotentHint=true, and destructiveHint=false, the description adds valuable context: it clarifies that retrieval is local and lexical, returns exact evidence and limitations, and does not store or echo the query. This goes beyond the annotations by describing the non-storing behavior and the lexical approach, which is helpful for agents to set expectations on privacy and retrieval style.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.