Google Chat is a communication software developed by Google built for teams that provides direct messages and team chat rooms, along with a group messaging function that allows Google Drive content sharing.
Create shared folders from approved project rows and message requesters.
Your team can find new project work in a shared folder named by your rules, with its link on the project row and in the requester's chat.
Move requested files into team channels and report each result.
Your team gets the file in the named channel with the requester's note. The requester gets a link or a clear reason it could not be shared.