It's a trademark of Trek skippers to hold the cards close to the chest, even as regards their own crew. Sisko could well have asked Worf, Dax, Nog and the rest for all the relevant data in a typically circumspect way, splitting the job according to the expertise of the respective officers - and Worf would be the last guy to put together something like that, even if Dax might have guessed what young Ben was up to this time.
Really, Sisko would only need to know things like "What is the population and population distribution?", "How many ships do you think they have?" and "Do you detect any increase or decrease in local comm traffic?". He could insert the specs of trilithium fallout himself, being no slouch in the usual renaissance man department.