Behavior
/mobtoggle switches mob spawning around the player between ON and OFF. ON is the default. OFF blocks configured server-generated mob spawn reasons inside the configured chunk radius. By default the radius is 32 chunks.
When a player switches OFF, affected mobs already present in loaded chunks are removed gradually in small region-owned batches. The cleanup never loads an unloaded chunk. Named and tamed mobs are protected by default, and Villagers and Wandering Traders are excluded. Spawn reasons and excluded entity types are configurable.
The preference is stored locally by UUID. The product does not require shared storage or multi-server synchronization because the effect applies to the online player's current server and position.