I just got my passport back from the British Consulate just 5 days after applying for my Marriage VISA

However I was expecting more than just a sticker in my passport that says "Entry Clearance".
My question is should I have got anything else that says VISA on it, and will I need any other official documents to prove that I am entitled to work in the UK?
I called the consulate and they said I had all I needed, but it all seems too simple!!!
Any advice would be appreciated!
Rachel