..
		},
		"aggregate" : {
			"help" : "{ pipeline : [ { <data-pipe-op>: {...}}, ... ] }",
			"lockType" : 0,
			"slaveOk" : false,
			"adminOnly" : false,
			"slaveOverrideOk" : true
		},
..

I would have expected that it included a "cursor: true", indicating it could either return a cursor or a document.
This would be inline with the other fieldnames in there, detonating "special behavior".

The help is also missing the option argument (i.e. cursor: ...)