What makes a good agency content idea
A good idea for content marketing for agencies, in the DemandOS sense, is one that shows understanding of a specific buyer, comes from someone who has actually done the work and supports the agency's position. If an idea fails any of those three, it is filler.
That standard is why ideas should come from the team. A project manager has a dozen stories about why launches slip. A media buyer has notes on what a test revealed. A strategist sees the same mistake across five accounts. Each of those is a post that only your agency could write.