A real agnostiocs knows the difference between belief and knowledge. The "modern" agnostics are only atheists but they do not like to believe this - they like to know this. That's why they misuse agnostsicism for their purpose. A real agnostics not only not knows whether god exists or not exists. A real agnostics also knows that it makes not any sense to say gods exists and not exists the same time - although god could really exist and not exist the same time. But to say so breaks down our standard logic and suddenly everything is true and never anything is wrong.
Agnostics acknowledge that there is neither evidence for, or against, the existence of God.
That's it.