[outworlder]

Left 4 Dead used a similar system and it was branded as a "AI storyteller"

It would basically look at what your team was doing. If a member decided to just go solo and do their own thing the AI would throw some mob that required a teammate to get rid of. If the team started having too many difficulties it would tone down the number of zombies and their placement. Etc

Think of "AI" as "game AI", not "machine learning". We have called NPC behavior "AI" in games even when they were simple decision trees.