Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. 'Create a new workspace' implies a write operation but doesn't specify what happens upon creation (e.g., default settings, permissions, or whether it's reversible). It lacks details on error conditions, rate limits, or authentication requirements, leaving significant gaps for an agent to understand the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.