Include alert source in system note if available

app/services/projects/alerting/notify_service.rb

@@ -66,7 +66,10 @@ module Projects
         return unless alert.save
 
         alert.execute_services
-        SystemNoteService.create_new_alert(alert, 'Generic Alert Endpoint')
+        SystemNoteService.create_new_alert(
+          alert,
+          alert.monitoring_tool || 'Generic Alert Endpoint'
+        )
       end
 
       def process_incident_issues

changelogs/unreleased/sy-improve-generic-alert-system-note.yml

+---
+title: Include monitoring tool from payload in system note for alert creation
+merge_request: 42631
+author:
+type: changed

spec/services/projects/alerting/notify_service_spec.rb

@@ -89,6 +89,7 @@ RSpec.describe Projects::Alerting::NotifyService do
 
           it 'creates a system note corresponding to alert creation' do
             expect { subject }.to change(Note, :count).by(1)
+            expect(Note.last.note).to include(payload_raw.fetch(:monitoring_tool))
           end
 
           context 'existing alert with same fingerprint' do
@@ -193,6 +194,11 @@ RSpec.describe Projects::Alerting::NotifyService do
                 environment_id: nil
               )
             end
+
+            it 'creates a system note corresponding to alert creation' do
+              expect { subject }.to change(Note, :count).by(1)
+              expect(Note.last.note).to include('Generic Alert Endpoint')
+            end
           end
         end