I thought the combination of too...to always resulted in a negative meaning, as in this sentence:
He is too smart to fall for your tricks.
(which, of course, means he is so smart that he cannot fall for your tricks)
Then, I came across this:
He is too ready to believe anything you tell him.
And that does not negate anything at all. Sources like this, however, state that too...to is always a negative construction, and yet, as I can see, it is not always a negative construction. So, other than the context itself, is there a rule to determine what too...to implies?