Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish read-only/idempotent safety, and the description adds real behavioral detail: it specifies that the response includes sequentially ordered nodes, each node's options/config/media status, and its next-node reference from clipform_set_logic. This explains the tool's traversal/routing behavior beyond what annotations convey.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.