diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
index 47763cab8cc..8d6b8e44921 100644
--- a/eng/SourceBuild.props
+++ b/eng/SourceBuild.props
@@ -1,3 +1,5 @@
+<!-- Whenever altering this or other Source Build files, please include @dotnet/source-build-internal as a reviewer. -->
+
 <Project>
 
   <PropertyGroup>
diff --git a/eng/SourceBuildPrebuiltBaseline.xml b/eng/SourceBuildPrebuiltBaseline.xml
index 150d370ded6..5e86a6ecc7e 100644
--- a/eng/SourceBuildPrebuiltBaseline.xml
+++ b/eng/SourceBuildPrebuiltBaseline.xml
@@ -1,4 +1,6 @@
-<!-- Prebuilt baseline changes must be reviewed by @dotnet/source-build-internal -->
+<!-- Whenever altering this or other Source Build files, please include @dotnet/source-build-internal as a reviewer. -->
+<!-- See aka.ms/dotnet/prebuilts for guidance on what pre-builts are and how to eliminate them. -->
+
 <UsageData>
   <IgnorePatterns>
     <!-- TODO: Ignore needed until https://github.com/dotnet/source-build/issues/3188 is addressed. -->