What is the frequency tolerance of AD9833 module?
The AD9833 is a DDS chip, read about that here: https://en.wikipedia.org/wiki/Direct_digital_synthesis

If you would clock the AD9833 an ideal exact clock then it's output frequency will also be exactly what it should be. It follows a certain mathematical relation exactly as a DDS is a clocked circuit.

There is no such thing as an ideal exact clock, in practice we would use a crystal oscillator which can be quite accurate. How accurate depends on the crystal and if you calibrate it to an exact frequency.

Due to the way a DDS works it cannot make every frequency, it can only make certain frequencies and what those are is related to the frequency of the clock you apply at the input.

If you need an exact frequency like 700 Hz for example then you can choose a lower crystal frequency to make the steps such that 700 Hz is possible. What clock frequency you would need for that 700 Hz I don't know, you would have to dive into the workings of a DDS and do the maths.