Where does the 5000 HTTP request limit come from? Is that the limit of the URLs array? I was curious to learn more about the endpoint, but can't find any onli

Where does the 5000 HTTP request limit come from? Is that the limit of the URLs array? I was curious to learn more about the endpoint, but can't find any online API docs. The docs ChatGPT suggests are defined for api.openapi.com, rather than chatgpt.com/backend-api. I wonder if its reasonable (from a functional perspective) for the attributions endpoint not to place a limit on the number of urls used for attribution. I guess potentially ChatGPT could reference hundreds of sites and thousands of web pages in searching for a complex question that covered a range of different interrelated topics? Or do I misunderstand the intended usage of that endpoint?