diff --git a/.github/workflows/disksage-hourly-review-repair.yml b/.github/workflows/disksage-hourly-review-repair.yml
index d1868bc20..8624fcd8a 100644
--- a/.github/workflows/disksage-hourly-review-repair.yml
+++ b/.github/workflows/disksage-hourly-review-repair.yml
@@ -13,6 +13,7 @@ concurrency:
 
 permissions:
   contents: read
+  id-token: write
 
 jobs:
   dispatch-review-repair:
diff --git a/docs/doctoring/disksage-hourly-review-caller.md b/docs/doctoring/disksage-hourly-review-caller.md
index 2e30aee8d..5d77dc42d 100644
--- a/docs/doctoring/disksage-hourly-review-caller.md
+++ b/docs/doctoring/disksage-hourly-review-caller.md
@@ -61,7 +61,10 @@ controls every mutation and merge decision.
 
 ## Credential and model boundary
 
-The queue-scanning caller has only `contents: read`. It maps only the established
+The queue-scanning caller grants `contents: read` plus `id-token: write`. The
+latter is limited to the central scheduler's OpenCode OIDC token exchange and
+does not grant repository content, issue, pull-request, status, approval, merge,
+or release write authority. The caller maps only the established
 `PR_REVIEW_MERGE_TOKEN` and `OPENCODE_APPROVE_TOKEN` scheduler credentials and
 does not use `secrets: inherit`.
 
@@ -88,8 +91,9 @@ neutral-required, stale-head, or synthetic-merge evidence is not success.
 ## Verification and rollback
 
 Repository contracts require the exact cron, target repository, one-dispatch
-budget, two-hour retry floor, non-cancelling single-flight policy, read-only
-workflow token, explicit secret mapping, and absence of both
+budget, two-hour retry floor, non-cancelling single-flight policy, the
+least-privilege workflow token (`contents: read` plus OIDC-only
+`id-token: write`), explicit secret mapping, and absence of both
 `NVIDIA_NIM_API_KEY` and `COPILOT_GITHUB_TOKEN` from the caller.
 
 Rollback is a reviewed source change. Do not disable exact-head binding, reduce
diff --git a/tests/test_disksage_hourly_review_caller.py b/tests/test_disksage_hourly_review_caller.py
index bee0d859b..bce9e4081 100644
--- a/tests/test_disksage_hourly_review_caller.py
+++ b/tests/test_disksage_hourly_review_caller.py
@@ -28,12 +28,12 @@ def test_disksage_caller_is_hourly_bounded_and_non_cancelling() -> None:
     assert 'retry_hours: "2"' in caller
 
 
-def test_disksage_caller_preserves_credentials_and_read_only_token_scope() -> None:
-    """The queue scanner maps established credentials without exposing model secrets."""
+def test_disksage_caller_preserves_credentials_and_oidc_token_scope() -> None:
+    """The caller grants only read access plus the scheduler's OIDC exchange scope."""
     caller = _read(CALLER)
     workflow_scope, jobs_scope = caller.split("\njobs:\n", maxsplit=1)
 
-    assert "\npermissions:\n  contents: read\n" in workflow_scope
+    assert "\npermissions:\n  contents: read\n  id-token: write\n" in workflow_scope
     assert "\n    permissions:\n" not in jobs_scope
     assert "PR_REVIEW_MERGE_TOKEN: ${{ secrets.PR_REVIEW_MERGE_TOKEN }}" in caller
     assert "OPENCODE_APPROVE_TOKEN: ${{ secrets.OPENCODE_APPROVE_TOKEN }}" in caller
@@ -62,6 +62,8 @@ def test_disksage_caller_doctoring_records_rca_feasibility_and_latency() -> None
         "NVIDIA_NIM_API_KEY",
         "COPILOT_GITHUB_TOKEN",
         "ContextualWisdomLab/disksage",
+        "`id-token: write`",
+        "OIDC token exchange",
         "APA 7th references",
     ):
         assert phrase in doctoring