Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full responsibility for behavioral disclosure. It states the fundamental definition of orphan, but does not clarify what counts as a link (wiki vs markdown, self-links), whether certain notes are excluded (e.g., templates, daily notes), or what the return format is (list of IDs, paths, full note objects). This leaves substantial ambiguity for an agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.