make calculator into mcp server

lang_agent/dummy/calculator.py

@@ -3,6 +3,7 @@ import random
 from dataclasses import dataclass, field
 from typing import Type, List
 import tyro
+import time
 
 from lang_agent.config import ToolConfig
 from lang_agent.base import LangToolBase
@@ -19,9 +20,28 @@ class Calculator(LangToolBase):
 
     def calculator(self, python_expression: str) -> dict:
         """For mathamatical calculation, always use this tool to calculate the result of a python expression. You can use 'math' or 'random' directly, without 'import'."""
+        # time.sleep(2)
         result = eval(python_expression, {"math": math, "random": random})
         return {"success": True, "result": result}
     
     def get_tool_fnc(self):
         return [self.calculator]
 
+
+# Global calculator instance
+calculator = Calculator(CalculatorConfig())
+
+# FastMCP server setup
+from fastmcp import FastMCP
+
+mcp = FastMCP("Calculator Server")
+
+
+@mcp.tool()
+def calculate(python_expression: str) -> dict:
+    """For mathematical calculation, always use this tool to calculate the result of a python expression. You can use 'math' or 'random' directly, without 'import'."""
+    return calculator.calculator(python_expression)
+
+
+if __name__ == "__main__":
+    mcp.run(transport="streamable-http", host="0.0.0.0", port=9000)