Pencil icon for create vs edit – Is there a correct answer?

I recently faced this scenario where I had to use 3 icons, for create, edit and add, respectively. The idea is that users will be able to create documents, add sections within the document and edit documents/sections.

A quick search on Google's Material design fetches this. I understand that the suggestion is to use the pencil icon as create while designing for content and as edit while designing for image manipulation.

Often, different apps and services use this icon interchangeably for both create and edit actions. Is there a consensus or literature on when the pencil icon must be used, and how to distinguish between 'create' and 'edit' actions? (I understand that a simple + can be used for create, but in my case, I was using it already for adding sections).