Run ANOTHER tool off the critical path: returns INSTANTLY while the target tool runs in the background, so a slow write/log/notify never delays your reply. Pass `tool` (the id of a tool you already have) and `args` (the target tool's arguments as a JSON object STRING). Optional `serialize_key` serializes background runs that share the key (e.g. the spreadsheet id when appending rows). Use ONLY for tools whose result you don't need this turn (logging, side-effect writes). Cannot run a tool you don't already have, cannot run a tool that requires approval, and cannot run a tool that deletes data — call those directly. Only callable from within an agent turn.
Connector