diff --git a/apps/ied_simulator/src/MmsClientController.cpp b/apps/ied_simulator/src/MmsClientController.cpp
index d0d74308b..7b5c68006 100644
--- a/apps/ied_simulator/src/MmsClientController.cpp
+++ b/apps/ied_simulator/src/MmsClientController.cpp
@@ -454,7 +454,8 @@ bool MmsClientController::connectToIed() {
             worker->session = std::move(session);
 
             if (self) {
-                QMetaObject::invokeMethod(self, [self, generation, model, associationProfile] {
+                const auto wireSummary = QString::fromStdString(discovery->summary());
+                QMetaObject::invokeMethod(self, [self, generation, model, associationProfile, wireSummary] {
                     if (!self || self->generation_ != generation) return;
                     self->treeModel_.applyDocument(*model);
                     self->iedName_ = QString::fromStdString(model->identity.ied_name);
@@ -475,6 +476,9 @@ bool MmsClientController::connectToIed() {
                             .arg(self->logicalDeviceCount_)
                             .arg(self->logicalNodeCount_)
                             .arg(self->dataAttributeCount_));
+                    // Capture the immutable worker result once; never query
+                    // session counters from the GUI or issue a diagnostic Read.
+                    self->appendDiagnostic(wireSummary);
                     emit self->modelChanged();
                     emit self->stateChanged();
                 }, Qt::QueuedConnection);
diff --git a/src/mms/live_discovery.cpp b/src/mms/live_discovery.cpp
index e39bed3cc..d89e09a33 100644
--- a/src/mms/live_discovery.cpp
+++ b/src/mms/live_discovery.cpp
@@ -262,6 +262,11 @@ std::string MmsLiveDiscoveryResult::summary() const {
            << data_set_directories.size()
            << ", rcbReads=" << successful_controls << '/'
            << report_controls.size()
+           << ", wireRequests=" << wire_budget.total()
+           << " [NameList=" << wire_budget.get_name_list
+           << ", GVA=" << wire_budget.get_variable_access_attributes
+           << ", DataSetDirectory=" << wire_budget.get_named_variable_list_attributes
+           << ", RCBRead=" << wire_budget.read_report_controls << ']'
            << ", diagnostics=" << diagnostics.size() << '.';
     return stream.str();
 }
diff --git a/tests/test_live_discovery.cpp b/tests/test_live_discovery.cpp
index 82b03b87f..9a7fc8068 100644
--- a/tests/test_live_discovery.cpp
+++ b/tests/test_live_discovery.cpp
@@ -485,6 +485,8 @@ void live_discovery_builds_csharp_compatible_read_only_model() {
     CHECK(result.wire_budget.get_named_variable_list_attributes == 1U);
     CHECK(result.wire_budget.read_report_controls == 1U);
     CHECK(result.wire_budget.total() == read_only_requests);
+    const auto budgetSummary = result.summary();
+    CHECK(budgetSummary.find("wireRequests=6 [NameList=3, GVA=1, DataSetDirectory=1, RCBRead=1]") != std::string::npos);
 }
 
 
@@ -638,6 +640,7 @@ void verified_data_set_hints_restore_late_ln_type_schema() {
     CHECK(result.wire_budget.get_variable_access_attributes == 2U);
     CHECK(result.wire_budget.read_report_controls == 0U);
     CHECK(result.wire_budget.total() == 6U);
+    CHECK(result.summary().find("wireRequests=6 [NameList=3, GVA=2, DataSetDirectory=1, RCBRead=0]") != std::string::npos);
 }
 
 void disconnected_optional_probes_do_not_inflate_wire_budget() {