The Rope of Climbing description states:
If you hold one end of the rope and use an action to speak the command word, the rope animates. As a bonus action, you can command the other end to move toward a destination you choose. [...] You can also tell the rope to fasten itself securely to an object or to unfasten itself, to knot or unknot itself, or to coil itself for carrying.
Other questions convey answers to the motions capable by the rope or whether the rope can be commanded from either end but the objects to which it can attach seem unspecified which thus seems to suggest it is a DM's call.
Is there any precedent across published adventures or guidance expressed from game designers on the breadth of surfaces or objects to which the Rope of Climbing can attach? If so what?
For example, can it attach to a completely smooth surface?