Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must disclose behavioral traits. It offers minimal transparency: it does not state if this is a mutation (destructive write), what happens if the path is invalid, whether it overwrites existing files, whether it triggers a full analysis re-run, or if it's safe for concurrent access. The sibling list includes patch_bytes (clearly destructive) and undefine (clearly destructive), but save_database's description doesn't clarify its safety profile at all. A mention like 'writes current state to disk, overwriting existing file at path' would greatly improve transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.