Taking a look at the UN website, it's no wonder most think of this as the first ever offensive UN force. Heck, it says so right here

The Security Council today approved the creation of its first-ever “offensive” combat force, intended to carry out targeted operations to “neutralize and disarm” the notorious 23 March Movement (M23), as well as other Congolese rebels and foreign armed groups in strife-riven eastern Democratic Republic of Congo.

.... and created, on an exceptional basis, a specialized “intervention brigade” within the operation’s existing 19,815‑strong force.
As most of us already know, this is Bravo Sierra

Be careful what you wish for in this part of the world. The Congo has tested and swallowed the best of the UN to include nearly 20,000 peacekeepers. So now they are permitted to load their weapons and employ them ? Those attack helicopters with rockets were then (defensive) as well as useless ?