Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden but only states it lists workspaces accessible to the current user. It doesn't disclose behavioral traits like whether this is a read-only operation, potential rate limits, authentication requirements beyond 'current user', pagination behavior, or what happens if no workspaces are accessible. This leaves significant gaps for an agent to understand operational constraints.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.