diff --git a/eng/pipelines/ext-azure-ai-agents-live.yml b/eng/pipelines/ext-azure-ai-agents-live.yml
index 3b9e8282978..63774d7f3dd 100644
--- a/eng/pipelines/ext-azure-ai-agents-live.yml
+++ b/eng/pipelines/ext-azure-ai-agents-live.yml
@@ -8,8 +8,14 @@
 # This pipeline is the live counterpart to the PR-gate checks in
 # `.github/workflows/lint-ext-azure-ai-agents.yml` (Tier 0 offline + Tier 1
 # recording/playback). Live Azure access is intentionally kept OUT of the
-# automatic PR pipeline (per Azure SDK EngSys / SFI guidance) and runs here only:
-#   - On demand via the PR comment:  /azp run ext-azure-ai-agents-live
+# automatic PR pipeline (per Azure SDK EngSys / SFI guidance). The PR trigger
+# below only associates this pipeline with relevant PRs targeting main so
+# `/azp run ext-azure-ai-agents-live` can queue it; the ADO pipeline definition
+# must be configured to require a team member comment before building PRs.
+# It runs only:
+#   - On demand via the PR comment:
+#       /azp run azure-dev - live - ext - azure.ai.agents
+#     (or, if accepted by Azure Pipelines: /azp run ext-azure-ai-agents-live)
 #     (requires write permission on the repo)
 #   - On the weekly schedule below.
 #
@@ -23,7 +29,17 @@
 #     project) to avoid anonymous rate limits — no extra secret setup required.
 
 trigger: none
-pr: none
+pr:
+  branches:
+    include:
+      - main
+  paths:
+    include:
+      - eng/pipelines/ext-azure-ai-agents-live.yml
+      - cli/azd/go.mod
+      - cli/azd/go.sum
+      - cli/azd/extensions/azure.ai.agents/**
+      - cli/azd/extensions/azure.ai.projects/**
 
 schedules:
   # 7am UTC Monday (offset from other weekly E2E pipelines to reduce contention).