Agbonlahor has been criticised by Villa supporters this season, with his lack of end product being a major source of frustration.
However, the attacker has been in fine form since Tim Sherwood's appointment and Richardson believes that he deserves credit for his recent performances.
"Gabby has done exceptionally well over the last few weeks which is great for the team," the experienced defender said. "We're all positive and confident about the coming weeks ahead."
Agbonlahor's pace has been vital in helping Villa increase their attacking threat under Sherwood, and the 28-year-old striker has already benefitted from having a manager who wants to play on the front foot.
Agbonlahor had looked isolated at times in Paul Lambert's system, but he is thriving under Sherwood's gung-ho approach.
The England international has scored three goals in his last six games and will be hoping to continue his fine goalscoring form as Villa look to avoid the drop.
At the moment the Claret and Blues are three points above the relegation places, but they face a tough game against Tottenham Hotspur this weekend, knowing that a defeat could see them slip back into trouble.