Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral disclosure burden. It states that a save operation occurs, but does not disclose whether an existing file at the path is overwritten, whether the original document remains open, or how doc_name selects the document to save. The term 'new' hints at a non-destructive save-as, but critical side effects are left unclear.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.