Any way to utilize the "All Compiler Errors..." etc error message type in the editor?

If possible, I would like to use a giant message that prevents the game from running like when there are compiler errors in a script. I have seen this done in the Terrain Composer 2 tool but haven't been able to find what this message type is called on Google among all the people asking about the titular error message.

Essentially, I want to try to make a tool me and my team are working on "designer proof". The tool is a pathfinding tool and requires the press of an editor window button to create or recreate the nodes, so I want it to be very clear if something hasn't been set up properly (or maybe there's an alternate method to make the tool more automatic? let me know).

Thanks.