PowerAutomate minimal permission requirements

HI All,

What are the minimal SharePoint permission requirements to allow a user to trigger a "for selected file" Flow?

I've inherited a library that has multiple folders, each with unique permissions - some people are allowed to view all documents, some are restricted as per the folders, there are also editors with the same restrictions.

What I need is for the Editors to be able to manually trigger a Flow that assigns others edit access to a single, selected file, these assignee's should also then be able to manually trigger a submit Flow.

The problem i have, is that i can't work out the permissions required to allow the asignees to manually trigger the workflow without giving them Edit access to the entire library.

Cheers

 Rob