The first one is, I think, almost a put-down - less a command than a drill-sergeant-like drubbing, a punishment for stepping out of line.

The second one reads as a news report: like I, the reader of the oncall rotation, am sharing the news that your name has come up. (If I was the sole controller of the oncall rotation it might come across a bit differently, as an actual command).

I like the contrast of these two!