Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=true, covering the safety and side-effect profile. The description adds only the scoping condition for 'orphan', which is useful, but says nothing about pagination, tenant-visibility limits, or the fact that unresolved principals may be a transient/edge state. Against rich annotations, a 2 reflects minimal added behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.