This is a genuinely unusual angle — agents doing the link exchange instead of a
human doing outreach. Question: how do you keep it from turning into the usual
link-farm pattern that Google punishes? Asking because most automated backlink
plays die on that exact issue.
They are nofollow links; the backlinks are more like "there is this doing X but I'm not vouching for them". So, while they are not dofollow backlinks, you can build them much more aggressively and at very low risk.
Also:
* not 1:1 reciprocal exchanges
* every owner/agent reviews what backlinks they insert into their own site (their own quality control)
* I quality control based on which sites are allowed to participate