It oftens seems impossible to get tools to resource camps.
Sometimes the tools arrive after a while, sometimes they don't. It seems to happen more when the tools have to come in by trade (I'm pretty sure they do come in by trade). What makes it really bad (and which is IMHO quite unnecessary) is that a resource camp seems to just shut down while it waits for the new tools, rather than at least work at the level of the best tools available (e.g. stone tools which are available by default). Can we please just have such camps at least running at stone tool levels while it waits for tools?
The combination of these facts make this one a real economy-wrecker. I had a case where I finally get hold of a single tin mine. Okay, I start creating bronze tools in the very same province, which luckily is a city... I set the tin mine to bronze tools. However, turns out my serfs just sort of aren't feeling it that year, or any year, and the mine just sits there waiting for its bronze tools whenever I set it to bronze tools. So whenever I even try, it shuts down the entire production chain leading up to my bronze tools! I mean, really...
This persists when I disable any other demands for bronze tools, and make sure there's available workers, so it isn't even a priority issue, I'd imagine.