diff --git a/AGENTS.md b/AGENTS.md
index 5daf3b70aa6..92d0f90a74b 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -40,10 +40,15 @@ The primary tool for this repository is `flutter_plugin_tools.dart`.
 
 ### Initial Setup
 
-First, initialize the tooling:
+First, define an environment variable for the repository root directory and initialize the tooling:
 ```bash
-cd $REPO_ROOT/script/tool # $REPO_ROOT is the repository root
-dart pub get
+# Define an environment variable for the repository root.
+export REPO_ROOT=$(pwd)
+
+# Verify that the environment variable is working correctly.
+echo "Repository root directory: $REPO_ROOT"
+
+dart pub get -C $REPO_ROOT/script/tool
 ```
 
 ### Identifying Target Packages
diff --git a/script/tool/README.md b/script/tool/README.md
index daa81e3309e..754a03d74e7 100644
--- a/script/tool/README.md
+++ b/script/tool/README.md
@@ -8,7 +8,7 @@ local development.
 Set up:
 
 ```sh
-cd script/tool && dart pub get && cd ../../
+dart pub get -C script/tool
 ```
 
 Run: