Israel has no duty to say anything about its capacity. The beauty of what Israel does is deterrence. If it has the stuff, that's deterrence. If it doesn't and others think it may have the stuff, that's deterrence. Nuclear power would be useful to Israel but not nearly as much as deterrence given that it is surrounded by murderous, bloodthirsty and delusional states. Incidentally, Mark, this will make you really happy. There are suggestions that Israel is in possession of the world's largest and most powerful nuclear arsenal. Of course, it doesn't need that much stuff. Perhaps as a gesture of good will, she should disarm one or two or even a couple of hundred.
World Jewish Congress: Nazi train treasures must go to rightful owners (Reuters)
from the article: IAEA will not tie Israel's nuclear program with Iran, sources say