Correct, your transmit (Tx) tone is the input tone to the repeater.
The repeater then transmits using its output tone, which you receive (Rx), so its your receive tone.
I recommend leaving your radio’s receive tone unset until you’re sure your transmit tone is working and the repeater is hearing your transmissions. You’ll hear everything on that frequency that way. Then, once you know you’ve got the transmit tone right you can always set your Rx tone.