Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden. 'Convert image to WebP format' implies a mutation operation but doesn't disclose behavioral traits like whether it overwrites the original, creates a new file, requires specific permissions, has rate limits, or returns a result. For a mutation tool with zero annotation coverage, this is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.