Well I don't believe there would be the option to take any decisions if it were like the other alerts, which in effect are notifications as the detection process is automatic (send to chest, default).
Where the autosandbox default setting is Ask so you have to interact with it, it might suggest that you run it in the sandbox but you can change decision, something which I don't think you can do in the current form of detection alert (unless you have that set to Ask). Then you would get a pop-up in the same way as the autosandbox one, enabling you to decide on the action.