Some plugins display messages in the dashboard. These often refer to pro versions or the installation of additional plugins, like this:

However, these messages are pointless if the plugin is used on a multisite and/or the users in the backend who see this message are not able to install new plugins.

I would therefore suggest adding a new rule and having it tested:

On single installations and on multisite:
If dashboard messages are displayed, then only to users with the administrator role.

If on multisite:
If dashboard messages are displayed, then only to users with the administrator role, provided they also have the capability to install plugins.

If a message is purely informative for users with a lower role on the current wordpress instance, the administrator must have a setting to turn this function on or off.

If such rules do not exist, there should be a warning message.