Function: get_stock_info
This tool belongs to the trading system, which allows users to trade stocks, manage their account, and view stock information. Tool description: Get the details of a stock.
Parameters: symbol: type: string
description: Symbol that uniquely identifies the stock. 
Required parameters: symbol
Response: price: type: float
description: Current price of the stock.
percent_change: type: float
description: Percentage change in stock price.
volume: type: float
description: Trading volume of the stock. MA(5) (float): 5-day Moving Average of the stock. MA(20) (float): 20-day Moving Average of the stock.