Hello fellow Michigander! Welcome to the boards.
Tony's is a good restaurant, but not to see the parade from. There is limited seating on the patio if you are lucky enough to get that. But you can't request it until you are there at the podium and then it isn't a guarantee. You also may have to wait if you request that area. Could be 10min could be 1/2 hour.
You can't see the parade from inside, so your only bet is the patio. That said, even though the patio is up higher, you won't see the whole floats as they go by because of the people between you and the street.
My recommendation is if the parade is a must switch your adr if you can.
Lastly, a 8:50 ressie for the 9pm parade, you may not be seated anyway.
Sorry I bring such news, but just trying to be honest with you.
Good luck and enjoy your vacation!!