try block, removed example, they confuse LLM

tool_functions.py

@@ -4,6 +4,7 @@ from tool_helper import tool
 import math_lexer
 import math_ast
 import math_interpreter
+import utils
 
 
 @tool
@@ -42,28 +43,34 @@ def math_evaluate(expression: str):
 Args:
     expression: Reduce mathematic expression (without '=') algebraically.
     """
-
-    tokens = math_lexer.tokenize(expression)
-    parser = math_ast.Parser()
-    ast = parser.parse(tokens)
-    return math_interpreter.interpret(ast)
+    try:
+        tokens = math_lexer.tokenize(expression)
+        parser = math_ast.Parser()
+        ast = parser.parse(tokens)
+        return math_interpreter.interpret(ast)
+    except Exception as e:
+        utils.print_error("Tool call evaluation failed. - " + str(e))
+        return "Tool call evaluation failed."
 
 
 @tool
 def math_solve(equations: list[str], variables: list[str]):
-    """evaluate a mathematical equation system and solve equation systems. Can be used to solve (x + 1)*(x - 1) = 1 for x as an example.
+    """evaluate a mathematical equation system and solve equation systems.
 Args:
     equations: list of mathematical equations containing a '='.
     variables: list of variables to solve for. Must be lower or equal the number of given equations.
         """
-
-    expression = "solve " + " and ".join(equations) + " for " + " and ".join(variables)
-    print(expression)
-
-    tokens = math_lexer.tokenize(expression)
-    parser = math_ast.Parser()
-    ast = parser.parse(tokens)
-    return math_interpreter.interpret(ast)
+    try:
+        expression = "solve " + " and ".join(equations) + " for " + " and ".join(variables)
+        print(expression)
+
+        tokens = math_lexer.tokenize(expression)
+        parser = math_ast.Parser()
+        ast = parser.parse(tokens)
+        return math_interpreter.interpret(ast)
+    except Exception as e:
+            utils.print_error("Tool call evaluation failed. - " + str(e))
+            return "Tool call evaluation failed."