Out of curiosity, what sort of tool were you offering? I’ve always heard about this but it’s never been my experience, so it really depends on the type of end user you have imo.
OP is currently trying to find a job and I think any attempt at open-sourcing his tooling (especially if it is useful) allows potential employers to review him in a better light. Abandoning it all seems wasteful when more and more companies try to find more reasons to filter out candidates.