Function: get_available_stocks
This tool belongs to the trading system, which allows users to trade stocks, manage their account, and view stock information. Tool description: Get a list of stock symbols in the given sector.
Parameters: sector: type: string
description: The sector to retrieve stocks from (e.g., 'Technology'). 
Required parameters: sector
Response: stock_list: type: array
description: List of stock symbols in the specified sector.
items: type: string