I live in the Annex neighborhood of Toronto. I have clay soil and lots of happy hostas. But some of my blue hostas have holes in some of their leaves, year after year. These particular hostas are growing under the shade of a Japanese maple (dappled light).
Slugs and snails generally like to feed on more delicate hosta leaves, rather than the thick larger leaves. They leave holes throughout the leaf. In your case it looks as if only the tip is damaged. I suspect you have squirrels nibbling on the young shoots of your blue hostas as they emerge from the ground in the spring. You may want to cover the area under your Japanese maple next spring with chicken wire to keep the squirrels away. The attached web site provides tips on how to go about it.
All the best for next spring!