Function: set_budget_limit
This tool belongs to the travel system, which allows users to book flights, manage credit cards, and view budget information. Tool description: Set the budget limit for the user
Parameters: access_token: type: string
description: The access token obtained from the authentication process or initial configuration.
budget_limit: type: float
description: The budget limit to set in USD
Required parameters: access_token, budget_limit
Response: budget_limit: type: float
description: The budget limit set in USD