The term you’re looking for is “constrained” and “unconstrained” actors. The Chinese and North Korean governments are state level actors, constrained by their internal institutions and power dynamics. A rogue wacko is unconstrained - they do whatever they want with no limitations beyond their own mind and individual capabilities.

Examples:

In the Iran Hostage Crisis you had a constrained actor (Iranian government) making somewhat rational choices to use hostage taking as a negotiation tactic.

In the Oklahoma City Bombing, you had unconstrained actors (Timothy McVeigh and Terry Nichols) blowing up a building with a vehicle borne improvised explosive device for personal reasons.