The extra responsibility doesn't faze the 29-year-old and he is looking to build on Scotland's successful summer tour to Argentina when his side face New Zealand on Saturday.
"I've been happy with the way I've been playing for Edinburgh so when Andy asked me I was obviously delighted to accept," Blair told the Scotsman.
"But I had a good think about it. With any big decision you have to take your time to mull it over.
"I was always going to do it, but I still wanted to think about it rather than just jump straight into something like that straight away. It's a massive honour leading your country, and I wanted to have a little bit of time for it to sink in with me and think about how I do it. But obviously I was delighted to tell Andy that I'd accept.
"I don't see captaincy affecting the way I play the game. We're looking at building leadership throughout the group of players that we've got around the squad so we have a group of six guys at the moment.
"So I feel my role is trying to get the best out of the other leaders, not speaking all the time, so that people are sick of my voice, but speaking when I think it's appropriate, with input from guys like John Barclay, Graeme Morrison, Dan Parks and Ross Ford in other parts of the game, so that I can still concentrate on my game but have that overall kind of feeling of control."
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