Normally where people get burned is that their boards get put in a "condensing" environment even though everything is specified as "non-condensing". But that's not a design problem so much as a specifications issue. tl;dr Don't sweat it and just do your design.

Understanding the Context

Good luck. But if these are just test points (which I agree I think they are) and you don't know where they lead to, then you couldn't get any use out of them anyway... so I wouldn't sweat it. Please specify the application more -- you give 1mV as a ballpark ripple figure, but not overshoot, and the voltage and current is unstated.

Key Insights

For example, 1mV ripple on a 10mV supply would be pretty easy to achieve, but 1mV out of 1kV would make most analog designers sweat. The maximum rate of change or frequency also must be specified, because a mere length of wire has inductance which ...