How do I decline messaging off-rover?

Rover facilitates the exchange of the messages that get routed through an (858) area code number and then automatically re-direct to their personal or your personal cell phone, so both parties can still enjoy the convenience of texting one another with safety and security of not disclosing your number. If you text that way, you'll also see your messages will be recorded in a string for each person, which can be helpful if you contact support and need them to review the conversation. The 858 number will not deliver messages to you during any "Quiet hours"if you set them. If you wish, you could provide your personal number, but that's kind of like throwing away a safety net. Sometimes when people are new to Rover, it can take a while to getting used to it, especially for some (often an older demographic) who do not use the internet much.

Your response is good. I'd likely write something like: On the left side of my screen, about half way down, there's a toll free 858 area code Rover assigned number that has been provided so we can contact each other, via phone or text messages. I can view the number to contact you, but only you and Rover can see the number assigned to you to contact me. This has been set up for the safety of everyone using the platform, so both parties can enjoy the convenience of texting one another with safety and security without disclosing personal numbers. Please feel free to contact me via that number. Look forward to hearing from you.