I hate these kind of calls, I start bristling immediately! Just because I've found through experience that 90% of these guys are TWs, or at best those who cannot be bothered to even look at basic details on my profile/website.
And it depends on their tone too, if they are polite/respectful I will give very basic details, if in doubt I just refer them to my website.
Funnily enough just had a guy phone up claiming there were no photos where he'd found me 'on the internet' asking for details, referred him to my website, and blow me but he actually phoned back, thats a first! If he shows up of course.......