Just as an FYI another way to do this is in the templates. You can create a NTFS template and UNIX template and appaly them to workflows accrodingly. You can use the volume object as the type of filterr and set you can set all kinds of default values within it including security style.
Sorry I don't think my explanation was that good. Templates are built in to WFA you don't have to create custom dictionaries and SQL filters for a new volume object you just create your template choose the default volume object for the stroage schema (This loads in all the attributes that are available for that object) and set all you settings there in the template. You then apply that template to the create volume command in your workflow to automatically get all the settings you specified in the template. I have NTFS and UNIX ones setup but also specify other things in them like dedupe, space reservation options, default junction paths. Any volume setting you can make when you are creating a volume are in the default template provided. Screenshot attached.