To see the permissions currently assigned to member roles, click the Workspace tab, click Properties, and then click the Permissions tab.
By default, all members except for Guests have permission to add new files or folders, modify files, and delete their own files or folders. Managers have all available permissions.
Additionally, in a SharePoint Files tool, all members except for Guests have permission to synchronize with the SharePoint document library, or to request synchronization control for the tool from the current synchronizer.
See Changing permissions for workspace tools for more information on modifying the default permissions for a tool.