Updated class documentation

com.unity.perception/Runtime/GroundTruth/Labelers/JointLabel.cs

         JointLabel,
         KeypointLabeler
     }
+
+    ///
+    /// These label's can also be applied to the keypoints found in the <see cref="Avatar"/> to override the self
+    /// occlusion tolerance values defined in the <see cref="KeypointTemplate"/> file. The <see cref="KeypointTemplate"/>
+    /// defines the typical tolerances for a model, but certain models may need to have specific overrides on a keypoint
+    /// for the self occlusion to work properly.
     /// </summary>
     [AddComponentMenu("Perception/Labeling/Joint Label")]
     [Serializable]

com.unity.perception/Runtime/GroundTruth/Labelers/KeypointLabeler.cs

     /// <see cref="Animator"/> <seealso cref="Avatar"/>. Custom joints can be
     /// created by applying <see cref="JointLabel"/> to empty game objects at a body
     /// part's location.
+    ///
+    /// Keypoints are recorded by this labeler with a state value describing if they are present on the model,
+    /// present but not visible, or visible. A keypoint can be listed as not visible for three reasons: it is outside
+    /// of the camera's view frustum, it is occluded by another object in the scene, or it is occluded by itself, for
+    /// example a raised arm in front a model's face could occlude its eyes from being visible. To calculate self
+    /// occlusion values, the keypoint labeler uses tolerances per keypoint to determine if the keypoint is blocked.
+    /// The initial tolerance value for each keypoint is set per keypoint in the <see cref="KeypointTemplate"/> file.
+    /// The tolerance of a custom keypoints can be set with the <see cref="JointLabel"/> used to create the keypoint.
+    /// Finally, a <see cref="KeypointOcclusionOverrides"/> component be added to a model to apply a universal scaling
+    /// override to all of the keypoint tolerances defined in a keypoint template.
     /// </summary>
     [Serializable]
     public sealed class KeypointLabeler : CameraLabeler