diff --git a/scripts/eval_toolcall.py b/scripts/eval_toolcall.py
index da078b4..c44be85 100644
--- a/scripts/eval_toolcall.py
+++ b/scripts/eval_toolcall.py
@@ -1,6 +1,8 @@
 import os
 import sys
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+import ast
+import operator
 import re
 import json
 import time
@@ -26,8 +28,22 @@ TOOLS = [
     {"type": "function", "function": {"name": "translate_text", "description": "将文本翻译成目标语言", "parameters": {"type": "object", "properties": {"text": {"type": "string", "description": "要翻译的文本"}, "target_language": {"type": "string", "description": "目标语言，如english、chinese、japanese、french"}}, "required": ["text", "target_language"]}}},
 ]
 
+def _safe_eval(expr: str):
+    _ops = {ast.Add: operator.add, ast.Sub: operator.sub, ast.Mult: operator.mul,
+            ast.Div: operator.truediv, ast.Pow: operator.pow, ast.USub: operator.neg,
+            ast.UAdd: operator.pos, ast.Mod: operator.mod, ast.FloorDiv: operator.floordiv}
+    def _eval(node):
+        if isinstance(node, ast.Constant) and isinstance(node.value, (int, float)):
+            return node.value
+        if isinstance(node, ast.BinOp) and type(node.op) in _ops:
+            return _ops[type(node.op)](_eval(node.left), _eval(node.right))
+        if isinstance(node, ast.UnaryOp) and type(node.op) in _ops:
+            return _ops[type(node.op)](_eval(node.operand))
+        raise ValueError(f"Unsupported expression: {ast.dump(node)}")
+    return _eval(ast.parse(expr, mode='eval').body)
+
 MOCK_RESULTS = {
-    "calculate_math": lambda args: {"result": str(eval(str(args.get("expression", "0")).replace("^", "**").replace("×", "*").replace("÷", "/").replace("−", "-").replace("²", "**2").replace("³", "**3").replace("（", "(").replace("）", ")")))},
+    "calculate_math": lambda args: {"result": str(_safe_eval(str(args.get("expression", "0")).replace("^", "**").replace("×", "*").replace("÷", "/").replace("−", "-").replace("²", "**2").replace("³", "**3").replace("（", "(").replace("）", ")")))},
     "get_current_time": lambda args: {"datetime": datetime.now().strftime("%Y-%m-%d %H:%M:%S"), "timezone": args.get("timezone", "Asia/Shanghai")},
     "random_number": lambda args: {"result": random.randint(int(args.get("min", 0)), int(args.get("max", 100)))},
     "text_length": lambda args: {"characters": len(args.get("text", "")), "words": len(args.get("text", "").split())},