I think the Grok button that is present on tweets is the best way to ask Grok about tweets. Tagging @grok just spams others' timelines with useless AI responses. The Grok button lets you keep it private.
A neutral 3rd party.
See his just-removed-after-public-outcry instruction to disregard "political correctness", which immediately resulted in it calling itself MechaHitler - or his previous instructions to try to cry about reverse racism in South Africa.