I'm constantly forgetting what dcmds are available (and walkers). What say you to an extension of ::dcmds and/or ::walkers to take a regular-expression string for matching the dcmd or walker name and description, and show only those (what you can do in mdb with ::dcmds ! grep, except that it would work in kmdb as well)?
We could assume .* fore and aft by default for substring matching. i.e. ::dcmds kma to show me all the kma-related dcmds, or ::dcmds page for all the page-list related things. We could add switches for searching only name or only description if needed, but my life would be a lot better just with the substring matching.