diff --git a/studio/backend/core/inference/safetensors_agentic.py b/studio/backend/core/inference/safetensors_agentic.py
index 8a536a4bfd..24b598a2a6 100644
--- a/studio/backend/core/inference/safetensors_agentic.py
+++ b/studio/backend/core/inference/safetensors_agentic.py
@@ -317,7 +317,9 @@ def run_safetensors_tool_loop(
             )
 
             tc_key = tool_name + str(arguments)
-            is_disabled = bool(allowed_tool_names) and tool_name not in allowed_tool_names
+            is_disabled = (
+                bool(allowed_tool_names) and tool_name not in allowed_tool_names
+            )
             already_ran_ok = any(
                 k == tc_key and not err for k, err in tool_call_history
             )
@@ -326,7 +328,9 @@ def run_safetensors_tool_loop(
             # asking the user to approve it would be noise. Registering the
             # approval slot *before* tool_start closes the race where the
             # confirmation could arrive before the waiter exists.
-            needs_confirm = confirm_tool_calls and not is_disabled and not already_ran_ok
+            needs_confirm = (
+                confirm_tool_calls and not is_disabled and not already_ran_ok
+            )
             approval_id = new_approval_id() if needs_confirm else ""
             decision_slot = (
                 begin_tool_decision(session_id, approval_id) if needs_confirm else None
diff --git a/studio/backend/state/tool_approvals.py b/studio/backend/state/tool_approvals.py
index b3b9e212d6..1fc7981eb7 100644
--- a/studio/backend/state/tool_approvals.py
+++ b/studio/backend/state/tool_approvals.py
@@ -58,9 +58,7 @@ def begin_tool_decision(session_id, approval_id) -> dict:
     return slot
 
 
-def wait_tool_decision(
-    slot, approval_id, cancel_event = None, timeout = _DECISION_TIMEOUT
-):
+def wait_tool_decision(slot, approval_id, cancel_event = None, timeout = _DECISION_TIMEOUT):
     """Block on a slot from ``begin_tool_decision`` until the user decides.
 
     Returns ``"allow"`` or ``"deny"``. Falls back to ``"deny"`` if the wait
diff --git a/studio/backend/tests/test_tool_approvals.py b/studio/backend/tests/test_tool_approvals.py
index 4855035435..10db93ea90 100644
--- a/studio/backend/tests/test_tool_approvals.py
+++ b/studio/backend/tests/test_tool_approvals.py
@@ -52,9 +52,7 @@ class _Waiter:
         kwargs = {"cancel_event": self.cancel_event}
         if self.timeout is not None:
             kwargs["timeout"] = self.timeout
-        self.result = request_tool_decision(
-            self.session_id, self.approval_id, **kwargs
-        )
+        self.result = request_tool_decision(self.session_id, self.approval_id, **kwargs)
 
     def start(self):
         self._thread.start()
@@ -209,7 +207,9 @@ def test_concurrent_distinct_calls_route_their_own_decisions():
     for i in range(n):
         aid = new_approval_id()
         waiters[aid] = _Waiter(f"s{i}", aid).start()
-    expected = {aid: ("allow" if i % 2 == 0 else "deny") for i, aid in enumerate(waiters)}
+    expected = {
+        aid: ("allow" if i % 2 == 0 else "deny") for i, aid in enumerate(waiters)
+    }
     for aid, decision in expected.items():
         assert resolve_tool_decision(aid, decision) is True
     for aid, w in waiters.items():
diff --git a/studio/backend/tests/test_tool_confirm_loop.py b/studio/backend/tests/test_tool_confirm_loop.py
index f3a8d7194f..060d26cdef 100644
--- a/studio/backend/tests/test_tool_confirm_loop.py
+++ b/studio/backend/tests/test_tool_confirm_loop.py
@@ -36,7 +36,9 @@ class _FakeExecuteTool:
     def __init__(self):
         self.calls = []
 
-    def __call__(self, name, arguments, *, cancel_event = None, timeout = None, session_id = None):
+    def __call__(
+        self, name, arguments, *, cancel_event = None, timeout = None, session_id = None
+    ):
         self.calls.append((name, arguments))
         return f"RESULT[{name}]"