Where in the world are you? Pictures?

There are places in the world where stone mulch is a fine idea. There are other places where it is close to the worst thing you can do for landscaping. So we will start with whether or not this is a good idea. If it is, then we will need pictures.

We live in an arid area and love our rock mulch but there are people who don't like it for wetter climates. Although not for everyone some people do use gravel mulch in the UK and southern US so its possible. Instead of sweeping or raking it you have to clean debri of it off with a leaf blower and if dogs run through it they can leave paths but otherwise its quite low care. The thicker it is the less weeds are a problem.

"some people do use gravel mulch in the UK" but it's rarely successful. Without constant grooming and regular topping off it becomes a green carpet of weeds, self sowers and moss. People think it'll reduce maintenance. In our climate it doesn't.

Yep, I have gravel gardens...which I love because I live in the driest part of the UK and grow a lot of drought-resistant perennials for a Mediterranean climate. But no, it absolutely is not low maintenance. A sharp hoe makes short work of weeds in my usual beds...but in the gravel gardens, I have to hand-pull every single weedling (and on a public allotment, there are millions). I did try using a landscape membrane underneath but that workd out worse than useless. Within a couple of seasons, blown in soil particles had migrated into the gravel which then made a perfect substrate for even more weeds...which then grow through the landscape membrane. The whole thing had to be removed...which took me the best part of a decade. So if you do use a rock mulch, try to avoid underlying membranes. There might, conceivably be a use in pathways...which can be given an annual herbicide treatment but around existing plants...nope.

Having said that, grasses, succulents, evergreen subshrubs and bulbs all do tremendously well...ad with a fill-in of the likes of eschscholzias, nemophila, platystemon, aurinia and sedums, the beds are really very lovely. I adore my gravel gardens intensely and am prepared to put in the continuous effort required to look good (alpines and other rockery plants such as lewisias,edraianthus, saxefrage and calandrinas) do well with the free-draining, warm substrate too