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The previous wording asked the agent to notice when a page "looks like" it hides content behind hover. That is not something an agent reading a text tree can judge: hover-only content is invisible by definition, and the marker that used to point at it came from the probing that is now off by default. Replaces it with a condition the agent can actually evaluate — an expected control is missing and no [has-submenu] marker points at a trigger — and places it on the escalation ladder ahead of get-html and screenshot, which is where that dead end is currently reached. Also documents [has-submenu]/[expanded] as the primary hover signal. It comes from aria-haspopup in the accessibility tree, costs nothing, and is unaffected by probing being off, so it covers menus that are marked up correctly.