Recently, I've gotten several voice mail messages from a writer asking me to call her back to tell her if "I'm accepting new clients."
I'm not going to call her back (now, or ever) because it's clear from the question that she doesn't understand how this query process works, and I don't want to spend 20 minutes on the phone doing Query 101, or worse Publishing 101.
She's asking "Are you accepting new clients" much like you'd contact a physician or dentist to ask if they are accepting new patients.
That presumes there are a certain number of slots and the next person to ask gets the one that's not filled.
That's NOT how querying works at all.
Even if I'm not eagerly searching out new clients, I'm always willing to read your query. Frankly most agents are. We're always on the hunt for good projects.
So, the right question to ask YOURSELF is "how do I query this agent?" To answer that you look at his/her website.
You don't call to ask.
You don't email to ask.
You just send the query.
It's so splendidly easy and simple that it's mind boggling, I know.