From Mod Wiki
entity (cannot be null) player -- Player the request is for. integer object -- Index of the deployObject to use. vector porition -- Position to request deployment at. float yaw -- Angle to deploy the object at. float delay -- Extra delay in seconds to add to the deployment time.
- This does not check the deployment grid for a valid location, to do that, use requestCheckedDeployment.
Tries to request deployment of an object at the given location, for a player, and returns whether the request succeeded or not.