diff --git a/bazel.sh b/bazel.sh
index 07f30840f..bc481d2cf 100755
--- a/bazel.sh
+++ b/bazel.sh
@@ -1,6 +1,11 @@
 #!/bin/bash
 
+# This script serves as a wrapper around bazel to limit the scope of environment variables that
+# may change the action output. Using this script should result in a higher cache hit ratio for
+# cached actions with a more heremtic build.
+
 env -i \
  PATH=/usr/bin:/bin \
  HOME=$HOME \
+ GOOGLE_APPLICATION_CREDENTIALS=$GOOGLE_APPLICATION_CREDENTIALS \
  bazel "$@"