I found myself using the phrase "[something] is at my disposal" as a way of indicating that a particular resource is available for my use.
My question arises from the word disposal. It seems to imply that the resource is gone once it is used. As in, "I disposed of the trash".
Another use would be, "He was going to help me, but was already disposed". In that case, it seems to mean "otherwise occupied" or "not currently usable".
@mfe pointed out that this usage was incorrect.
So I can say, "The tool is at my disposal". This naturally seems to mean that while I am using it, others probably can not.
If I say, "The firewood is at my disposal". It would mean that I am able to permanently deplete the firewood by using it.
So the question is, if I'm referring to a resource that can not be used up and a particular use of it does not prevent furtherer use (such as a concept in the mind), is it correct to say that it is "at my disposal" simply because I am able to use it?
Its also possible that I'm confusing similar terms. Can anyone help me straighten this out.