diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/ComponentCrossReference.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/ComponentCrossReference.cs
index d6fe9cf9bd3cf0..41e4d8b12d1c85 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/ComponentCrossReference.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/ComponentCrossReference.cs
@@ -5,6 +5,9 @@
 
 namespace System.Runtime.InteropServices.Java
 {
+    /// <summary>
+    /// Represents a cross-reference between two tracked component groups.
+    /// </summary>
     [CLSCompliant(false)]
     [SupportedOSPlatform("android")]
     [StructLayout(LayoutKind.Sequential)]
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/MarkCrossReferencesArgs.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/MarkCrossReferencesArgs.cs
index 50c2ff414ada8f..f8878a2842fe37 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/MarkCrossReferencesArgs.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/MarkCrossReferencesArgs.cs
@@ -5,14 +5,33 @@
 
 namespace System.Runtime.InteropServices.Java
 {
+    /// <summary>
+    /// Data for the callback supplied to <see cref="O:JavaMarshal.Initialize" />
+    /// for marking managed objects referenced from Java during cross-reference processing.
+    /// </summary>
     [CLSCompliant(false)]
     [SupportedOSPlatform("android")]
     [StructLayout(LayoutKind.Sequential)]
     public unsafe struct MarkCrossReferencesArgs
     {
+        /// <summary>
+        /// The number of strongly connected components being reported.
+        /// </summary>
         public nuint ComponentCount;
+
+        /// <summary>
+        /// A pointer to the array of strongly connected components.
+        /// </summary>
         public StronglyConnectedComponent* Components;
+
+        /// <summary>
+        /// The number of cross-references being reported.
+        /// </summary>
         public nuint CrossReferenceCount;
+
+        /// <summary>
+        /// A pointer to the array of cross-references.
+        /// </summary>
         public ComponentCrossReference* CrossReferences;
     }
 }
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/StronglyConnectedComponent.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/StronglyConnectedComponent.cs
index e1553ebf4824e3..2a711511c4108c 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/StronglyConnectedComponent.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Java/StronglyConnectedComponent.cs
@@ -5,6 +5,10 @@
 
 namespace System.Runtime.InteropServices.Java
 {
+    /// <summary>
+    /// Represents a strongly connected component of managed objects
+    /// referenced for cross-reference processing.
+    /// </summary>
     [CLSCompliant(false)]
     [SupportedOSPlatform("android")]
     [StructLayout(LayoutKind.Sequential)]