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. 'Update multiple tasks' implies a write/mutation operation, but the description doesn't mention permissions required, whether updates are atomic/partial, error handling for failed updates, rate limits, or what the response contains. For a batch 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.