As the subject states, I'm trying to prevent a message fulfilling
certain conditions from being evaluated by the rules. Is there a token I
can intercept to do this?

I had the idea to add a rule that would filter for the aforementioned
condition, which would stop all rule execution. But I've read that I
can't influence the position of rules created via the token API. Thus
all rules coming before this added rule would already have gone into
effect. Is this correct?

Is there any other way you can think of how to achieve this?

Thanks in advance, Martin Schmidt