
His appearance is very standard, even for a Bond villain. You'd probably run into 20 (or more) guys like that just by going to the mall. Imagine telling someone to find a person "6 Foot, White, Black Hair", That'd be nearly impossible. Except for a third nipple, but that's not very helpful for finding him, unless he's at the beach or something.
Well, Scaramanga doesn't have many defining features to begin with. I mean, yes, they've eliminated the guy who's three foot ten, but that doesn't exactly narrow things down that much. If one of the few points of info they have on Scaramanga is that he's six-foot, that still leaves hundreds of millions of other six-foot men to go through. They do have a sketchy description but it is hardly as helpful as you seem to think- if they say they have "no clue" of what he looks like, they aren't meaning it literally. At no point does Bond suspect Nick Nack is Scaramanga though. ( Some think M is withholding information from Bond.) Even a sketchy description is better than none. He used to work in a circus so hundreds of people have seen him (even if it was 20 years ago, that would still tell them that he's six foot tall and thus eliminate, for example, Nick Nack). Why doesn't MI:6 know anything about Scaramanga's appearance? They have a full bio on him and yet they have no clue as to what he looks like (except his third nipple). And it isn't even the calibre Scaramanga uses. The 'trinket' could have been made anywhere. "Well obviously it's useless as a bullet." The Fairbanks bullet was a real bullet used by Scaramanga.
Why does Bond go to all that trouble to get the bullet that killed Bill Fairbanks, when he already has the bullet that was sent to him?.How in the Hell could Goodnight accidentally press a button with her butt, and not feel the button goosing her ass?.It's certainly not beyond believability that MI6 would use freelancers on occasion.Hip's identity and the other use of the Queen Elizabeth until Bond is aboard and when Bond goes into Red Chinese waters, both he and Bond say M knows nothing of the mission. Hell, it wouldn't even be the first piece of information M withheld in this film: He takes Bond off the Gibson case and plays dumb when Bond suggests he kill Scaramanga first he withholds Lt.
If so, it would be neither the first time nor the last when M withheld information from Bond.
It could be that M had it all along, and indeed, that he already had a lot more information on Scaramanga than he claimed. Bond and Goodnight actually seemed just as surprised and confused as the audience.
How in the hell did M not only know the phone number to Scaramanga's boat, but also that Bond was onboard with both the Solex Agitator and Miss Goodnight?!.