One generic tool in the desktop_ui toolset: discover what is on screen,
highlight an element with narration, or hand the user a paged tour. No tour
content lives in the code — the agent authors each one live, which is what
makes 'how does this work?' answerable as a walkthrough instead of a wall
of text.
Rides the existing blocking-prompt bridge (tour.request/.respond) like
read_preview, so it works on every connection topology.
Brooklyn Nicholson