All tolerances (also XY) of z-axis milling?

Heyho PCB-Way Team,

I checked already the PCB capabilites, but I couldn't find a page where I can find the z-axis milling tolerances.

I'm saw that there was another forum-thread, where the support wrote the that the Z-tolerance is "Non-metallic depth tolerance is +/-0.1mm, metallization tolerance is +/-0.2mm." (https://www.pcbway.com/project/question/PCB_Z_axis_Milling.html)

I would be also interested in the XY-tolerances, as I want to have a square-cavity with corner-millings and a depth of aroud 0.3-0.5mm, where I can place a part in and connect it from two pads located left and right from the z-Axis Milling. I imagine it like:

To be sure the part fits in, I want to considere the XY-tolerance of your machines, why it would be nice, if you could list them in your answer all together.

Thank you in advance and kind regards,