A very powerful corporation is interested in building a device that works similar to a magic lamp.
You bring the lamp to a certain location, at a specific time of the year, chant specific mantras, then make a wish. Your wish will be fulfilled in 2-3 days. Basically, the device will transmit the wish to a small team in the company, and if all conditions are met, the company will start working on making your wish come true.
The corporation is very powerful: it is above the law and is willing to do anything no matter how unethical or illegal to fulfill the holder's wish (as long as it doesn't interfere with the interests of the corporation).
There are certain wishes that the company, and therefore the lamp, cannot fulfill:
Standard loopholes (e.g infinite wishes)
Limitations due to natural laws (e.g cannot change gravity)
Limitations due to financial laws (e.g inflation)
Limitations due to technological advancement (we can assume the corporation exists in the current/ near future time).
There are also other limitations that are imposed by the company itself to protect its interest. For example, you can wish to destroy a certain small village but you can't wish to destroy the whole earth (or a large part of it) as it will be against the company interests.
The company is interested in making the lamp work as similar to a magic lamp as possible. For that, all wishes that can be interpreted into something the company can do, will be fulfilled. If someone wishes to be beautiful (no matter how subjective this is), they will make some arrangements to send him to a cosmetic surgeon to make him look as good as possible.
The main problem comes when the lamp is released into the public: how to provide a good enough set of rules that determines the limitations of the lamp (what you can wish for) without revealing that the corporation itself is behind this device?
The corporation would like the public to think that this is a magic lamp but has limited magical properties.
My first thought was to create a rulebook that comes with the lamp and gives detailed explanation of what the holder is allowed to wish for. But I think this is very impractical; the book is going to be really large and you cannot rely on people to read it fully.
If possible, I would like to explain these limitations in a small set of rules that can be inscribed on the lamp.
The rules do not have to be extremely specific. It is ok if, after simplifying the rules, there are still some grey areas where the limitations are not really known (e.g how much max money can you wish for), for this I am relying on the fact that lamp will work only once per year and so the holder of the lamp will be very careful with his wish.
To be clear, I'm looking for a way to summarize the limitations of the lamp in a way that is simple and accessible to the general public, while also maintaining that it is in fact a magic lamp (and not one created by the corporation).