Connection between Airbnb and myRent is content and has few description which you can push via myRent.
Description you can find in myRent under property details-desription:
Please choose in filter: AirBNB:
You will find 9 fields to fill it out:
At each description at the bottom of the page you will find AirBNB logo. Put your mouse over it and it will show you how is the description called in AirBNB.
IMPORTANT: Make sure that all 9 descriptions are filles out.