Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral disclosure burden. It does disclose the 2-hop scope and the returned nodes/edges, and the verb 'Get' implies a read-only operation. It does not mention authentication requirements, behavior for unknown DIDs, pagination, or data freshness, leaving some gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.