The uses of will and would are distinguished succinctly in When should I use would / would have / will / will have?.
In the context of your example, would is used when you are describing a condition - something which would happen if something else happened first. Will is used when you are stating an intention or predicting the future - ie when the condition has already happened.
In your example there is a condition, so would is correct : "If the caller attempted to use some object, then ... would be the result."
However, I think there may be bigger problems with your sentence than the choice between would and will. The meaning of the sentence is far from clear. Perhaps the context would provide enough explanation. Otherwise, your concern about which word is correct is misplaced. Clear communication is much more important than using correct grammar.
In common practice, would and will are used interchangeably. English as a first language is not taught as thoroughly as when it is a second language. Considerable laxity is tolerated, especially in spoken English.