diff --git a/src/agent.py b/src/agent.py
index ed2dc16..64a9eae 100644
--- a/src/agent.py
+++ b/src/agent.py
@@ -219,7 +219,7 @@ class FolderTransport:
             os.remove(os.path.join(req_dir, rid + ".json"))
         except OSError:
             pass
-        raise ConnectionError("хаб не ответил через папку %s за %.0f с" % (self.root, timeout))
+        raise ConnectionError("не ответил через папку %s за %.0f с" % (self.root, timeout))
 
     @staticmethod
     def _write(directory: str, name: str, payload: dict) -> None:
@@ -238,6 +238,9 @@ class FolderTransport:
                     resp = json.load(f)
                 if not isinstance(resp, dict):
                     raise ValueError("ответ не объект")
+                status, body = resp.get("status"), resp.get("body")
+                if type(status) is not int or not (body is None or isinstance(body, str)):
+                    raise ValueError("неверные типы status/body")   # bool — подкласс int, поэтому type(), не isinstance (M-2 agent#8)
                 break
             except (ValueError, OSError):
                 if time.monotonic() >= end:
diff --git a/tests/test_folder.py b/tests/test_folder.py
index d9474c5..bc00d74 100644
--- a/tests/test_folder.py
+++ b/tests/test_folder.py
@@ -88,6 +88,28 @@ class FolderTransportTest(unittest.TestCase):
             hub.settings()
         self.assertIn("нечитаемый ответ", str(e.exception))
 
+    def _bad_response(self, payload):
+        path = os.path.join(self.root, "resp-bad.json")
+        with open(path, "w", encoding="utf-8") as f:
+            json.dump(payload, f)
+        ft = agent.FolderTransport(self.root, "Bearer x")
+        ft.BAD_JSON_WAIT = 0.3
+        return ft, path
+
+    def test_wrong_status_type_is_unreadable(self):
+        for payload in ({"id": "x", "status": "ok", "body": "{}"}, {"id": "x", "status": True, "body": "{}"},
+                        {"id": "x", "status": 200, "body": 5}):
+            ft, path = self._bad_response(payload)
+            with self.assertRaises(ConnectionError) as e:
+                ft._take(path)
+            self.assertIn("нечитаемый ответ", str(e.exception))
+
+    def test_no_answer_message_has_no_hub_prefix(self):
+        hub = self.client(timeout=0.3)
+        with self.assertRaises(ConnectionError) as e:
+            hub.settings()
+        self.assertFalse(str(e.exception).startswith("хаб"))    # цикл сам пишет «хаб: …» (O-3 agent#8)
+
     def test_late_response_is_not_reused(self):
         self.run_relay("late", delay=1.0)
         with self.assertRaises(ConnectionError):