I had a similar experience with a gate agent...Frankly, I don't blame the G/A, but the whole process of them being in the dark...
Flew ORD-LAS on an 9PM departure a few weeks ago. Because I connected into ORD, didn't have a chance to grab dinner before my travels commenced. Asked at the RCC, they didn't know if there was a true 'meal' or not. Went down to the gate about 20 mins before boarding, asked again, "It says here, 'refreshments' will be served in F". I assumed and pressed further, "So, that means no meal, just the PopChips and Cliff Bars, right?...No salad or sandwich or the like?" He countered, "Uhhhhh...It's something between those two".
I FIGURED it was just the snack basket, even though the G/A was less than helpful...So I grabbed something. Glad I did, it was just the basket...Surprising for a 4+ hour flight, even with a late departure.
Yet another negative byproduct of UDU, IMhO...I'm sure management's take is, "We're giving them F for free! Why should we have to feed them properly?"