The tool had no cursor-move/hover action, so "move the mouse to the search box"
had nothing to call and a weak model just claimed it had moved it. Add a
moveMouse action wired to human.humanHover (real xdotool cursor), targetable by
CSS selector or site= (that site's search box). Also clarify in the tool
description that 'navigate' types into the address bar (no mouse) while
'search'/'type' move the real cursor to the on-page box and click before
typing, so the model picks the visible-cursor path when the user wants it.
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