Ibrox side Glasgow Rangers visit McDiarmid Park on Friday night.
O'Halloran is not eligible to face his parent club on Friday when Rangers visit McDiarmid Park.
The Scottish striker was loaned out to the Saints after Gers boss Caixinha admitted publicly that he did not need him - and then said he would not be coming back.
And Davidson believes that some of his colleagues will ask O'Halloran for the "inside track" on his Rangers team-mates ahead of tomorrow.
Davidson told the Dundee Courier: "He will have the inside track, maybe, but we haven’t had much of a chance to speak to him about it.
"It's a miss not having Michael in the team but we can use him to our advantage, see what he has to say about Rangers.
"It can be awkward for him because he's still a Rangers player. So, whether the boys go and ask him, that might be a personal thing. But I’m sure it might happen."
Missing the Rangers man is a big miss for St Johnstone.
O'Halloran has netted five times in six Premiership games for the Saints, but it will be interesting to know if he does offer up details about his Ibrox team-mates.
He is unlikely to feel any loyalty to Caixinha after how the Portuguese has spoken about him in recent months, but he remains a Rangers player for now so it is quite awkward.