What is Universe Design Tool?

The term "Universe Design Tool" is very broad and doesn't refer to a specific, well-defined technology or software. It could conceptually refer to any software or methodology used to design, simulate, or manage complex systems, virtual environments, or simulated worlds. This might include tools used in game development (e.g., level editors, world-building software), simulation software (e.g., for simulating physical systems, economic models, or social networks), or even abstract conceptual frameworks used in fields like science fiction writing or theoretical physics for modeling hypothetical universes. Without more context, it's difficult to pinpoint a specific tool that fits this description.