Should be no tools required if it's a stock shock. The only adjustments are the Hard/Soft lever and the rebound adjuster knob at the bottom of the shock.
IF aftermarket, if you're wanting to tweak preload and don't have a remote hydraulic preload adjuster, you will most likely have to remove the shock, adjust, re-install, try it, etc. Damping adjustments however should be accessible.
What are you looking to adjust??
Might be some road crud making the ball bearing detent stick. Work it, perhaps a little spray of PB50 or other penetrating lube... fully turn clockwise (looking up) until it seats (lightly), then back out 7-8 clicks to start. Go ride, tweak from there.
I was wearing heavy gloves so I didn't hear or feel them. I'll try cleaning the knob, some WD40, some thinner gloves and see where that gets me. At this point I think it's OK. Maybe a little hard. I just want to know where it is.