Hi Anna Maria,
This is a great topic and set of questions! I, too, find ToC review to be a common (and highly useful) task, yet one which would benefit from more explicit guidance and attention. In my work, I have connected it to the broader notion of evaluative thinking--collaborative ToC creation and review happens in a mutually-beneficial and reinforcing feedback loop with evaluative thinking.
In terms of resources, one paper on this process, with some specific steps/guidelines suggested, is attached and also available via the USAID LearningLab here.
It describes work supported by Catholic Relief Services to do exactly what you are referring to. I hope this is helpful!