That license does not cover the JSON spec; nearly all JSON parsers are not distributed under that license. I assume Crockford's original reference implementation of a JSON parser is released under that license, and not much else.

But JSON isn't software, it's just a specification. Any text that matches the specification is JSON, whether it is binary, a string, printed on a piece of printer paper, etc. So what does this license mean, exactly?

The JSON License was created to cover the original Crockford JSON parsing and linting libraries.

My employer specifically forbids us from using the json.org license because it's not considered FOSS