How is this different than Dropbox Dash (formerly known as Command-E)? What I love about Dash is that no metadata/index leaves my computer - are you taking the same approach?
We've also found searching messaging platforms (Gmail / Slack) and the generative aspect to be the most difficult. Finding links to docs that you know the title of is less challenging. So if you just use Command E for Dropbox / Drive / Local, then it's almost certainly the right solution for you.