diff --git a/.github/workflows/lock-issue.yml b/.github/workflows/lock-issue.yml
index 6a9aed9..f8e8b11 100644
--- a/.github/workflows/lock-issue.yml
+++ b/.github/workflows/lock-issue.yml
@@ -32,7 +32,9 @@ jobs:
     steps:
       - uses: dessant/lock-threads@v4
         with:
-          github-token: ${{ secrets.BOT_GITHUB_TOKEN }}
+          # The BOT_GITHUB_TOKEN secret should contain a valid GitHub token.
+# The workflow will fail with a "Bad credentials" error if the secret is missing or invalid.
+github-token: ${{ secrets.BOT_GITHUB_TOKEN }}
           issue-inactive-days: '365'
           exclude-issue-created-before: ''
           exclude-issue-created-after: ''