There are situations where the IRS might want more details about your bank account. They may want to learn more about some of your transactions. Observing this information might alert them to assets you could use to pay off your debt.
If the IRS is seeking more information about your account, the first thing they would do is ask you for these records directly. If you refuse to supply the information or fail to reply at all, they may summon the records straight from your bank. Your bank must comply with these summons.