Update app.py

app.py

@@ -4,7 +4,6 @@ import requests
 import inspect
 import pandas as pd
 import re
-import json
 from pathlib import Path
 from typing import Optional
 from dotenv import load_dotenv
@@ -34,6 +33,7 @@ class OpenRouterLLM(ChatOpenAI):
 
 @tool
 def search_web(query: str) -> str:
+    """Search the web using DuckDuckGo and return current information."""
     try:
         search_url = f"https://api.duckduckgo.com/?q={query}&format=json&no_html=1&skip_disambig=1"
         response = requests.get(search_url, timeout=10)
@@ -53,6 +53,7 @@ def search_web(query: str) -> str:
 
 @tool
 def search_wikipedia(query: str) -> str:
+    """Search Wikipedia for factual information and return a short summary."""
     try:
         search_url = "https://en.wikipedia.org/api/rest_v1/page/summary/" + query.replace(" ", "_")
         response = requests.get(search_url, timeout=10)
@@ -66,6 +67,7 @@ def search_wikipedia(query: str) -> str:
 
 @tool
 def execute_python(code: str) -> str:
+    """Execute Python code safely and return the output or error message."""
     try:
         safe_globals = {
             '__builtins__': {
@@ -93,6 +95,7 @@ def execute_python(code: str) -> str:
 
 @tool
 def read_excel_file(file_path: str, sheet_name: Optional[str] = None) -> str:
+    """Read an Excel file and return its contents as a formatted string."""
     try:
         file_path_obj = Path(file_path)
         if not file_path_obj.exists():
@@ -116,6 +119,7 @@ def read_excel_file(file_path: str, sheet_name: Optional[str] = None) -> str:
 
 @tool
 def read_text_file(file_path: str) -> str:
+    """Read a text file and return its contents as a string."""
     try:
         file_path_obj = Path(file_path)
         if not file_path_obj.exists():