Who actually uses or needs this kind of tooling? What exatly is "multi-service coordination" and why should anyone non-academic building actual systems care what it means? HATEOAS doesn't solve the problem anyway. What happens when a field requires fixed-point arithmetic to two places? Your tools are going to get that wrong unless you start adding types. In the end you need humans to read proper documentation and implement carefully thought out solutions. This is the XML conceit all over again.