System wide alert or custom notification

We would like the ability to apply a system wide alert or custom message across the reading list system for notification of downtime and other important user-facing communications. Ideally this message would flow via the LTI into our Learning Management System. Or perhaps this could be part of the LTI configuration so that our Learning Management team could apply messages when relevant. An example from another system is OCLC WMS's Custom notification text. For example: https://lant.on.worldcat.org/discovery and https://help.oclc.org/Library_Management/WorldShare_Acquisitions/Settings/Custom_notification_text

Currently, the message on the Talis home page can be edited, but the majority of access at our institution is via the LTI (or directly to a list), so the messaging on the home page is missed.