Not necessarily. If the house is for more than 5 (or various other conditions), it legally needs to be registered by the Council as a HMO, and any decent agent will make sure of that. Obtaining the HMO license involves a huge amount of work including all the relevant checks. The Council would be able to confirm quickly that the property is properly licensed.
Beyond that, as a landlord, when letting a property I try to steer clear of tenants I think may be demanding, and I suspect I am not alone. Often there is only so much you can do, say with getting a heating engineer out in an emergency and if you are doing your best, the last thing you want is an earful. Yet increasingly that is what happens. Long gone are the cheerful tenants who suggest they will shower at the local leisure centre for a couple of days, and make do with a storage heater.
My advice when looking around is to take good notes/photos so you can review later, ask reasonable questions, but not to be too "clever". Instead impress the agent with your domesticity, and the likelihood that you will look after the house. Then check the HMO status independently. The inventory should record a tested smoke/heat alarm on each floor (normally heat in the kitchen, smoke in the hallway), a current gas safety certificate and a carbon monoxide alarm. If not insist that they are provided. Electrical certs are not normally legal requirements for non HMOs.