Landlords can only legally ask for last month's rent and a refundable key deposit at the time of signing a lease
Requirements
Make sure your post does not discriminate against people based on protected grounds such as age, race, ethnic origin, place of origin, citizenship, disability, gender identity & expression, sexual orientation, etc.
If there is a gender requirement, clarify whether the entire building/house is dedicated housing for a specific gender or if someone already occupies the enclosed unit and will share a kitchen/bathroom with the new tenant
No guests, gatherings, or illegal rules
Verify that there are no illegal rules based on the RTA [MR4][YZ5] that interfere with tenants’ right to reasonable enjoyment of their unit (e.g., having visitors, guests, or gatherings).
If the tenant will share a kitchen or bathroom with the landlord or their immediate family, ensure this information is included in the ad description.