Is CloudSim a framework?

Excuse me, but I'm a bit confused about something. I've come across the term "CloudSim" quite a few times in my research on cloud computing and simulation frameworks. Could you please clarify for me if CloudSim is indeed considered a framework? I'm trying to understand if it's a comprehensive toolset designed to facilitate the modeling, simulation, and management of cloud computing environments, or if it serves a different purpose entirely. I'd really appreciate your insights on this matter.