Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. 'Remove' implies a destructive mutation, but nothing states whether it is undoable, whether an invalid index errors or no-ops, or whether remaining FX indices shift after removal—a critical behavior for a tool keyed by fx_index.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.