Dividing by surface rather than by material
Leaf litter on a path is a cleaning and safety matter; the same leaves in a garden bed are not. Dividing by surface gives a rule that works in every season and does not require anybody to judge intent. It also matches the equipment: a cleaning provider has brooms, blowers and vacuums for hard surfaces, and a grounds contractor has mowers, cutters and chemical qualifications for planted areas.
The exception worth naming is where beds sit directly beside an entry and litter blows continuously onto the path. Clearing the bed edge can be included as a specific item so the path stays clear for longer. That is a practical addition rather than a general extension into gardening, and describing it narrowly is what keeps it from drifting. It also stops a useful addition turning into an open-ended obligation.
