is a widely respected name in the community. It is often distributed as a script rather than a standalone executable. It acts as a scanner that looks for games with "Remote Spy" vulnerabilities.
If successful, a GUI (Graphical User Interface) will appear. This GUI is now running on the server. Any buttons you press (like "Give all players tools" or "Set Gravity") will happen for everyone.
There is no permanent "install" for serverside executors. Roblox updates every Wednesday. You will have to re-download and re-inject these tools weekly.