Where can more information be found about Dragonmoots?

In the Rise of Tiamat campaign, Dragonmoots are briefly mentioned in chapter 14:

And again on chapter 9:

Other than these two instances there seems to be nothing else to be found, at least in D&D 5e sources. Even the FR wiki has nothing to add on this topic. Is there any source that details the dragonmoot tradition on the Forgotten Realms?