The Nurture Assistant is only capable of processing 10 different attachments at any one time because of the current limitations arounds Large Language Models such as OpenAI and Azure which powers the Nurture Assistant. They have a buiilt in limit of 10 attachments which is why we limit the number of documents a teacher can select from their curriculum boundary at any one time.
Whilst you can select up to 10 attachments, we reccomend only choosing 1-3 of your most focused documents that are relevant to your task for the strongest, most focused output.
As Large Language Models like OpenAI improve, we hope that this restriction will be removed in time.