Actually it was fully stated. On a bet a long time ago I decided to run a low level ninja mage [~5/3 IIRC, cover as martial artist] in the middle of a higher level party [12+]. Having a good reference library I set up quite a few 'tricks' to set up advantageous moments, most physical or very minor alchemical.
The beholder was an unpleasant surprise, in a one-way section of the dungeon we were in. The DM expected us to rush it and was prepared to strip the characters down with the AM and other effects. There were also several minions, armored ogres or small giants IIRC to beat us up. I'd elected to stealth ahead, found the set-up and went back to the party to set up a counter ambush.
I'd already made a number of what I called 'pepper-horns' which were conical twists of paper filled with a ground mix, then sealed on both ends. Pop the big end off and tear a small hole on the tip and you have a great dispenser. I loved to blow a batch under doors, then enter. Great way to cause confusion! So at the beginning of the game I'd gone shopping, purchased new supplies and was lugging the 3 lbs. in my kit bag as I was remote from my shop. The silk was part of my regular kit, camo dyed and part of my field kit [4 meters sq plus a couple of 1m sq., all very sheer]. We cut head hoods for the party, which cut visibility a bit but not too much. Kept them from breathing it or getting much in the eyes.
Sneak back down the way, toss the big batch in with a gust to send it fully into the room. Once the powder is in motion the AM beam is useless, even if he'd fired it off. Air convection in the semi-closed space keeps it moving, and every one moving in the room keeps it stirred up. Signal the rush to the party down the way by tossing a couple of low level flash powder eggs [the famous ninja flash disappearance] and the beat down was on. We still took a lot of lumps from the ogres, but they ended up fighting blind at a severe disadvantage. A couple of our party got rips in the head hood and failed saves - down they went. That still left us at a pretty good ratio and we didn't loose the magic weapons that gave us an edge. I'll admit to closing on the beholder with a pistol crossbow from my pack to get the central eye, certainly wasn't a fair fight.
The real secret was the 10+ pages of character notes. I'd stated out where the pouches and pockets were, what was in them and combo moves that were 'automatic' due to training. That character grew into filling a three ring binder as he was detail intensive. For example the decorative braiding on the outside of the pants legs was really leather cords with wire cores, tack stitched on, with 1 oz oval weights at either end. Deadly as striking cords or an entangling tool [bolo style]. A small dart was built into the hilt of his Sai with dual helical counter sprung whalebones to power it. Only lt. crossbow equivalent and a pain to re-arm [took a jig at home to compress] but a nasty surprise in a fight. Poisoned as well.
And yes, I did charge the party for services..... at hazard rate!
I agree with the rottweilers, we played similar rules of documentation <G>.