1-He did something to make me nervous.
Does this imply that he intended to make me nervous?

2-What did John do to make Harry nervous?
Does this imply that the speaker thinks that John intended to make Harry nervous?
1-- Not necessarily

2-- Not necessarily
Students: Are you brave enough to let our tutors analyse your pronunciation?
Either of them may show suspicion about someone,or you can call this inquiry or prejudgment of someone about another someone
Best Regards
Thanks a lot Mister Micawber,

How about these two:

1-He did something in order to make me nervous.

2-What did John do in order to get Harry nervous?

These necessarily imply intention, don't they?
Yes, I think adding 'in order' makes that idea clear.
Teachers: We supply a list of EFL job vacancies