Covert? I should laugh.
Trump literally announced it globally by tweet on his usual presidential tweeterphone channel. "Something big has happened!" Hundreds of millions of people could have seen that, including Russia and ISIS. And Russia and Turkey and Iraq were all in on it because it was arranged to go through various air spaces without confrontation. So you can't get much more covert than that.
And yet the Gang of Eight heard it at the same time as you did. That is, a non-covert operation that bypassed set protocols because of irrational personal bias.
Did Trump tell his team to act this way? Probably not directly. Trump never makes direct orders. He's more of a mafia don..."Why can't this be done like I want it? Make him an offer...etc." Trump wanted al-Baghdadi dead, sure. But he didn't design or run the op, or even know the date or details. That was all to be done by henchmen.
Of course, Trump's henchmen are a bunch of lawless clueless suck-ups looking for any brownie-points from Boss Donny, and this was a sure-fire way to squelch the impeachment goings on which would please him as well. Or so they thought.
There are no adults left in that room. Nobody who would tell them the correct protocols for this. So chances are they didn't even bother to check the paperwork. They just cheerfully launched into what was essentially a PR exercise that involved Delta Force ('Murica heroes!) and a bunch of brown Muslim countries (faceless expendables), and asking his pal Russia to look the other way (buddy Putin!). What could possibly go wrong?
Well, the op went fine, which is all to the good. But the PR exercise has been a failure. But never mind. The MAGA-nuts will lap it up nonetheless.
And then he got boo'ed at the baseball. So we have all moved on.