I meant is it’s not a service I’d depend on in a regional crisis as they can and will deprioritse it. It is not the main mission as the following passage to that sentence shows:

The functions of a diplomatic mission consist, inter alia, in representing the sending State in the receiving State; protecting in the receiving State the interests of the sending State and of its nationals, within the limits permitted by international law; negotiating with the Government of the receiving State; ascertaining by all lawful means conditions and developments in the receiving State, and reporting thereon to the Government of the sending State; promoting friendly relations between the sending State and the receiving State, and developing their economic, cultural and scientific relations.[18]

It’s not even rare for embassies outside of the first world’s to be openly hostile or outright useless to their own citizens in a pinch during times of peace.