[quote=RabidAnubis]
...Secondly, OP, I thought that most people would understand the basic functions of the guild since it is a rather prestigious organization?...
[/quote]

The basic functions are a given, but the methods through which they do their jobs aren't exactly common knowledge :). Hence, the need for a rundown. Like Karadar said, most visitors are only permitted in the lobby area, so they wouldn't be aware of the rest of the rooms in the Guild. Take for example a delivery company, not everyone is aware of how Fedex organizes and ships deliveries. Especially since there is no internet in this universe XD.