Context 2 means it should show up in chat right click user menu item. Context 1 is hub context and should only show up in hub tab right click menu at the top of the screen. However, the latter is not implemented and I'm not sure it will ever be implemented because it seems pretty pointless. Based on your command you need the parameters to be replaced with user data so you probably only want it shown in chat menu (context 2).
Context 2 means it should show up in chat right click user menu item. Context 1 is hub context and should only show up in hub tab right click menu at the top of the screen. However, the latter is not implemented and I'm not sure it will ever be implemented because it seems pretty pointless. Based on your command you need the parameters to be replaced with user data so you probably only want it shown in chat menu (context 2).