I send notifications to assigned analysts and end users which include URLs to take them directly to particular actions in Workspaces0. For example, this link lets you quickly add an attachment by clicking the URL:
Nearest I can tell, this is because the "AddAttachment" action is a "Create Related" action, which includes its own form. The "Completed" action has an Action Type of "None" so there's no form to display. Got it. So how do I trigger such an action?