InterSystems Management Portal is a web application that lets you perform system administration and management tasks for the InterSystems Data Platform.
To give you some context: I have a user who has been assigned only the role %HS_UsageDashboard_Access.This allows them to access the dashboards correctly (by giving the direct URL). Then, if I try to access the Management Portal with this same user, I can log in with no access to any resources within it (as expected).