Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. 'Enable/disable' implies a state mutation, but the description doesn't specify whether this requires admin permissions, what happens to dependent systems, whether the change is immediate or requires restart, or what the expected response format is. For a mutation tool with zero annotation coverage, this leaves significant behavioral gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.