Function: fund_account
This tool belongs to the trading system, which allows users to trade stocks, manage their account, and view stock information. Tool description: Fund the account with the specified amount.
Parameters: amount: type: float
description: Amount to fund the account with. 
Required parameters: amount
Response: status: type: string
description: Status of the funding operation.
new_balance: type: float
description: Updated account balance after funding.