diff --git a/Code/Framework/AzFramework/AzFramework/Terrain/TerrainDataRequestBus.h b/Code/Framework/AzFramework/AzFramework/Terrain/TerrainDataRequestBus.h
index 9379485646..8b29f2a554 100644
--- a/Code/Framework/AzFramework/AzFramework/Terrain/TerrainDataRequestBus.h
+++ b/Code/Framework/AzFramework/AzFramework/Terrain/TerrainDataRequestBus.h
@@ -161,7 +161,8 @@ namespace AzFramework
                 SurfacePointListFillCallback perPositionCallback,
                 Sampler sampleFilter = Sampler::DEFAULT) const = 0;
 
-            //! Returns the number of samples for a given region and step size.
+            //! Returns the number of samples for a given region and step size. The first and second
+            //! elements of the pair correspond to the X and Y sample counts respectively.
             virtual AZStd::pair<size_t, size_t> GetNumSamplesFromRegion(const AZ::Aabb& inRegion,
                 const AZ::Vector2& stepSize) const = 0;