diff --git a/lib/src/mcp/mcp_server.dart b/lib/src/mcp/mcp_server.dart
index 7b80a8125..d6d97fc4e 100644
--- a/lib/src/mcp/mcp_server.dart
+++ b/lib/src/mcp/mcp_server.dart
@@ -251,6 +251,13 @@ Only one value can be selected.
                   '(e.g. // coverage:ignore-line). '
                   'Only applies to Dart tests (dart: true).',
             ),
+            'show_uncovered': BooleanSchema(
+              description:
+                  'Whether to list uncovered lines when coverage is below '
+                  '100%. Implicitly enables coverage collection when used '
+                  'alone. Useful for identifying which lines still need '
+                  'tests after a min_coverage failure.',
+            ),
             'timeout_seconds': IntegerSchema(
               description:
                   'Maximum seconds to wait for the test run before killing '
@@ -441,6 +448,9 @@ Only one value can be selected.
     if (args['check_ignore'] == true) {
       cliArgs.add('--check-ignore');
     }
+    if (args['show_uncovered'] == true) {
+      cliArgs.add('--show-uncovered');
+    }
     if (args['timeout_seconds'] != null) {
       cliArgs.addAll([
         '--timeout',
diff --git a/test/src/mcp/mcp_server_test.dart b/test/src/mcp/mcp_server_test.dart
index 6c36ce9a3..986c1c05f 100644
--- a/test/src/mcp/mcp_server_test.dart
+++ b/test/src/mcp/mcp_server_test.dart
@@ -388,6 +388,7 @@ void main() {
                 'platform': 'chrome',
                 'run_skipped': true,
                 'check_ignore': true,
+                'show_uncovered': true,
                 'timeout_seconds': 60,
               },
             ),
@@ -426,6 +427,7 @@ void main() {
             'chrome',
             '--run-skipped',
             '--check-ignore',
+            '--show-uncovered',
             '--timeout',
             '60',
           ]),