Several people have wondered aloud in the comments column about why anyone with an agent would ask Miss Snark about stuff. The unspoken thought is "surely you should ask your own agent about that", and in fact that is what Miss Snark advises sometimes.
Even if you have an agent asking questions here not being a nitwit by default. For starters, the stakes are lower. It's very hard to discuss "should I fire my agent?" with your agent, much less "is my agent a a nincompoop?"
And even for those minor questions, it's easier to ask someone who has no stake in the outcome or in the relationship. And a lot of times, it's good to see the answer you knew was right, but just needed to hear someone say it.
And it's also of benefit to a lot of other people. You ask your agent, and you'll know. You ask here, and one or two other people with the same question will see the answer too. It's very efficient...Miss Snark is very fond of efficiency.
Writing to Miss Snark is a bit like a study group in grad school. Yes there's a professor out there (your agent) but you ask a lot of questions in study group that you'd never ask in class or in an appointment with the prof. (When was the war of 1812? Who's buried in Grant's Tomb? Is a pink tam too frivolous for an editorial lunch?)
So, Ask Away. Just remember to put them in an email to Miss Snark, questions in the comment column don't get read often or fast.