Not in my experience. Recruiters may be clueless, but they will only pass what was given to them. Companies with well-defined requirements will either make sure

Not in my experience. Recruiters may be clueless, but they will only pass what was given to them. Companies with well-defined requirements will either make sure they have recruiters who understand what they require or copy it precisely, or don't use recruiters as much and rely on communicating with developers directly. I had way better experience with those who say "you will be working on a project involving mainly X and maybe some Y" than ads stating "we are looking for C, Scala, CSS etc.". Some of course say "we have range of project and we want polyglots", but if they don't, its definitely lack of care and understanding of technology.