fix mcp

tests/test_graylog_aggregate.py

@@ -20,6 +20,11 @@ class _AggregateClient:
         return self.responses.pop(0)
 
 
+class _ProbeErrorClient:
+    def probe(self):
+        raise RuntimeError("connection refused")
+
+
 class GraylogAggregateTests(unittest.TestCase):
     def test_reads_count_from_graylog_schema_rows(self):
         client = _AggregateClient([
@@ -33,6 +38,11 @@ class GraylogAggregateTests(unittest.TestCase):
         self.assertEqual(client.arguments[0]["streams"], ["firewall"])
         self.assertEqual(client.arguments[0]["metrics"], ["count()"])
 
+    def test_returns_error_status_instead_of_raising_on_probe_error(self):
+        status = GraylogAggregateSource(_ProbeErrorClient(), "firewall").fetch_count()
+        self.assertEqual(status["aggregate_status"], "error")
+        self.assertIn("probe_error", status["aggregate_error"])
+
     def test_tries_fallback_argument_shape_after_tool_error(self):
         client = _AggregateClient([
             {"result": {"isError": True, "content": [{"type": "text", "text": "bad metrics"}]}},