Fix type annotation for chat_history_messages parameter

Co-authored-by: pontemonti <7850950+pontemonti@users.noreply.github.com>

Author: Copilot

libraries/microsoft-agents-a365-tooling/microsoft_agents_a365/tooling/services/mcp_tool_server_configuration_service.py

@@ -29,7 +29,7 @@
 import aiohttp
 
 # Local imports
-from ..models import MCPServerConfig, ToolOptions
+from ..models import ChatHistoryMessage, MCPServerConfig, ToolOptions
 from ..utils import Constants
 from ..utils.utility import get_tooling_gateway_for_digital_worker, build_mcp_server_url
 
@@ -503,7 +503,7 @@ async def send_chat_history(
         conversation_id: str,
         message_id: str,
         user_message: str,
-        chat_history_messages: List,
+        chat_history_messages: List[ChatHistoryMessage],
         auth_token: str,
         options: Optional[ToolOptions] = None,
     ):