diff --git a/src/google/adk/cli/service_registry.py b/src/google/adk/cli/service_registry.py
index 7269eebb..2ea286ef 100644
--- a/src/google/adk/cli/service_registry.py
+++ b/src/google/adk/cli/service_registry.py
@@ -250,9 +250,16 @@ def _register_builtin_services(registry: ServiceRegistry) -> None:
       return memory_session_factory("memory://", **kwargs)
     elif db_path.startswith("/"):
       db_path = db_path[1:]
-    kwargs_copy = kwargs.copy()
-    kwargs_copy.pop("agents_dir", None)
-    return SqliteSessionService(db_path=db_path, **kwargs_copy)
+
+    # SqliteSessionService only accepts db_path, warn if extra kwargs provided
+    ignored_kwargs = {k: v for k, v in kwargs.items() if k != "agents_dir"}
+    if ignored_kwargs:
+      logger.warning(
+          "SqliteSessionService does not support additional kwargs. "
+          "The following parameters will be ignored: %s",
+          list(ignored_kwargs.keys()),
+      )
+    return SqliteSessionService(db_path=db_path)
 
   registry.register_session_service("memory", memory_session_factory)
   registry.register_session_service("agentengine", agentengine_session_factory)
diff --git a/tests/unittests/cli/test_service_registry.py b/tests/unittests/cli/test_service_registry.py
index 05b03ac4..37c6e7c2 100644
--- a/tests/unittests/cli/test_service_registry.py
+++ b/tests/unittests/cli/test_service_registry.py
@@ -63,13 +63,25 @@ def test_create_session_service_sqlite(registry, mock_services):
   mock_services["sqlite_session"].assert_called_once_with(db_path="test.db")
 
 
-def test_create_session_service_sqlite_with_kwargs(registry, mock_services):
-  registry.create_session_service(
-      "sqlite:///test.db", pool_size=10, agents_dir="foo"
-  )
-  mock_services["sqlite_session"].assert_called_once_with(
-      db_path="test.db", pool_size=10
+def test_create_session_service_sqlite_ignores_unsupported_kwargs(
+    registry, mock_services, caplog
+):
+  """Test that SqliteSessionService ignores unsupported kwargs and logs warning."""
+  import logging
+
+  with caplog.at_level(logging.WARNING):
+    registry.create_session_service(
+        "sqlite:///test.db", pool_size=10, agents_dir="foo"
+    )
+
+  # SqliteSessionService should only receive db_path, not pool_size
+  mock_services["sqlite_session"].assert_called_once_with(db_path="test.db")
+
+  # Verify warning was logged about ignored kwargs
+  assert (
+      "SqliteSessionService does not support additional kwargs" in caplog.text
   )
+  assert "pool_size" in caplog.text
 
 
 def test_create_session_service_postgresql(registry, mock_services):