Gives the desktop agent one whole screen, or one half of a single screen. It lists windows whose center is inside, snapshots that rectangle, and left-clicks or replaces a control value. These tools do not move the system mouse, but the package also registers desktop_step, which drives the real mouse and keyboard across the whole virtual desktop (up to 20 actions per call, including key combinations such as Alt+F4 and typed text), plus get_screen_metrics; asking before acting is only in the tool description, not enforced. Windows only; compiles a C# helper with csc on first use; its tool names match dsh-desktop-tools-plugin, so do not enable both.