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. While 'write' implies a mutation operation, it doesn't specify whether this overwrites existing files, appends, creates new files, requires specific permissions, handles errors, or has any side effects. This leaves significant behavioral gaps for a file system operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.