fix mcp

tests/test_graylog_source.py

@@ -23,6 +23,11 @@ class _ErrorClient:
         return {"result": {"isError": True, "content": [{"type": "text", "text": "Tool call failed: timeout"}]}}
 
 
+class _ProbeErrorClient:
+    def probe(self):
+        raise RuntimeError("connection refused")
+
+
 class GraylogSourceTests(unittest.TestCase):
     def test_applies_custom_mapping_to_generic_stream_message(self):
         client = _Client()
@@ -56,6 +61,12 @@ class GraylogSourceTests(unittest.TestCase):
         self.assertTrue(status["partial"])
         self.assertIn("graylog_search_error", status["error"])
 
+    def test_returns_partial_status_instead_of_raising_on_probe_error(self):
+        events, status = GraylogStreamSource(_ProbeErrorClient(), "vpn").fetch()
+        self.assertEqual(events, [])
+        self.assertTrue(status["partial"])
+        self.assertIn("probe_error", status["error"])
+
     def test_requests_selected_profile_fields(self):
         client = _Client()
         GraylogStreamSource(client, "windows", profile_fields=("TargetUserName", "EventID")).fetch()