This bit in particular is contradictory that made me think that NO-ONE actually knows much about them, other than they exist and can offer aid in dire circumstances. Codex:GK's has a passage about the treatment of Imperial Forces who witness them in action, which says:
Page 13 again. See where I'm coming from? While Logan Grimnir might have the authority (or even just raw charisma) to ask the Inquisition to send someone to help him, the bolded bit - despite the lore about the War for Armageddon - absolutely does not describe the Space Wolves!