The most common use of the suffix '-ed' is to conjugate a verb to the past tense - eg:
present tense: They lift the object together.
past tense: They lifted the object together.
It can also be used to turn certain words into adjectives - eg:
noun: concert
adjective: concerted
verb (present tense): bless
adjective (as well as past tense of verb): blessed
In regard to your examples, neither are quite correct, but small changes could make either option viable:
Please let me know which input to consider.
or
Please let me know which input should be considered.