I have a tiny pond more like a ditch........... it been here for a couple of years and I don't know how they do it but toads arrived quickly.
Don't know if they came in with some smelly compost or they found their way in? The cats have brought some in (alive) so have just popped them in there. I don't see the toads very often but every few months I catch a glimpse. Saw one in the flower beds a few months ago I go along with the theory that adding some water is the best way to increase the diversity of wildlife.
My ditch is in the worst probably place, under 2 beech trees, I do try and get some netting over it in the Autumn, other than that I leave it alone........it's probably got a bit of leak so in the summer months I do top it up a bit
I have made sure that there are steps to the water entrance so that any creature can find a way out