Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description carries the full disclosure burden, and it does almost none of it: no statement that this is a read-only operation, no note on whether files are read locally, no size/permission constraints, and no indication of what a 'toxic flow' finding contains. Only the implicit read-only nature of 'scan' is conveyed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.