fix tool name exceed (#679)

Co-authored-by: luyan <suluyan.sly@aliabab-inc.com>

Author: suluyana

ms_agent/tools/tool_manager.py

@@ -1,5 +1,6 @@
 # Copyright (c) Alibaba, Inc. and its affiliates.
 import asyncio
+import os
 from copy import copy
 from typing import Any, Dict, List, Optional
 
@@ -10,6 +11,8 @@
 from ms_agent.tools.mcp_client import MCPClient
 from ms_agent.tools.split_task import SplitTask
 
+MAX_TOOL_NAME_LEN = os.getenv('MAX_TOOL_NAME_LEN', 64)
+
 
 class ToolManager:
     """Interacting with Agent class, hold all tools
@@ -45,7 +48,12 @@ async def reindex_tool(self):
         def extend_tool(tool_ins: ToolBase, server_name: str,
                         tool_list: List[Tool]):
             for tool in tool_list:
-                key = server_name + ':' + tool['tool_name']
+                max_server_len = MAX_TOOL_NAME_LEN - len(
+                    tool['tool_name']) - 1  # 减去 ':' 的 1 个字符
+                if len(server_name) > max_server_len:
+                    key = f"{server_name[:max_server_len]}:{tool['tool_name']}"
+                else:
+                    key = f"{server_name}:{tool['tool_name']}"
                 assert key not in self._tool_index, f'Tool name duplicated {tool["tool_name"]}'
                 tool = copy(tool)
                 tool['tool_name'] = key