The pace bowler has secured over 300 dismissals in 71 appearances with an impressive average.
Australia's chief selector Bailey has confirmed that skipper Cummins will play a "major part" in the forthcoming Ashes series.
There were concerns that Cummins might sit out due to a persistent back stress problem that was still troubling him.
Earlier indications from the squad suggested no final decision had been made regarding whether he would play, with the five-Test series kicking off on 21 November in Perth.
The selector shared that his recovery is on track and was "optimistic" about his chances of participating.
"We're aware that the clock is ticking and multiple considerations around that, not only the back issue, but further aspects," the selector added.
"It's positive. We firmly believe that he will feature a major part. With luck it's the first Test. If not, then we'll pick it up."
Past Concerns
The captain missed the ODI and T20 games against both Asian and Trans-Tasman rivals in the previous weeks after medical tests showed a lower back issue.
Previous incidents include of recurring issues, with recurrences in 2012-13, 2013-14 and 2015-16 leading to absences from multiple domestic campaigns in a short span.
He emphasized he would be ""aggressive" and "take risks" in his rehabilitation process to make the squad for the series.
Bailey noted that he did not know if Cummins had begun bowling as part of his rehabilitation but conceded it was "getting tight" for him to be fit for the opener.
Alternative Arrangements
In case of absence, former captain Steve Smith will take over the captaincy.
The talented all-rounder was excluded lately from the national team for their ODI contests against the Asian giants as a precautionary measure because of discomfort in his torso.
Bailey described it as a "small issue and stated that he'll feature in the state-level matches, so will be "in a good place to resume bowling."
"We put so much time has gone into building out the plan for him to take part for the first Test as an all-rounder," he elaborated.
"Originally, he'd only feature in the starting games in any case. How he handles the willow in shorter formats, should it hinder progress for a short period, the choice was made to take a cautious route."
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