I just did some testing with this entity and am afraid that it doesn't live up to it's name.
You can get a monster to jump, but it only seems to 'run up and over' even if there isn't anything there.
The height property won't make the monster jump higher... if that makes sense, but I am wondering if this was used to help monsters navigate ramps and stairs?
Test and retest till you get something to work, and let me know.