diff --git a/.bazelrc b/.bazelrc
index 765363c..dde54fe 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -3,6 +3,7 @@
 build --experimental_strict_action_env
 build --action_env=PATH
 build --disk_cache=~/.gerritcodereview/bazel-cache/cas
+build --java_toolchain //tools:error_prone_warnings_toolchain
 
 test --build_tests_only
 test --test_output=errors
diff --git a/tools/BUILD b/tools/BUILD
index 00f2cbe..9533a6d 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -14,8 +14,10 @@
     visibility = ["//visibility:public"],
 )
 
-# This EP warnings list borrowed from here:
+# Error Prone errors enabled by default; see ../.bazelrc for how this is
+# enabled. This warnings list is originally based on:
 # https://github.com/bazelbuild/BUILD_file_generator/blob/master/tools/bazel_defs/java.bzl
+# However, feel free to add any additional errors. Thus far they have all been pretty useful.
 java_package_configuration(
     name = "error_prone",
     javacopts = [