A WM project (lingualibre.org) closely connected to Commons via API bumped into API ratelimits. The documentation of this is really limited and dispersed. I added a specific section into API:Upload#Ratelimits, but I encourage you do create the page API:Ratelimit to properly document this dimension :
- list of actions which can be limited
- where to configure ratelimits
- how to see the ratelimits
I collected some information and API link in https://lingualibre.org/wiki/LinguaLibre:User_rights as well, which can be useful for a first draft. I'am not a mediawiki developper, I don't feel legitimate enough to create and write such documentation page on the official mediawiki website. I therefor submit to confirm editors and programmers this issue to consider.