Difference Between Tool and Library and Framework

I want to develop "something" for testing web application that do the followings:

• collects HTTP request from user interaction through Selenium WebDriver, save each request to a file
• allows user to define input generation by modifying the file
• generates inputs and sends HTTP request (and get the HTTP response)
• analyze the HTTP response
• generates report for user

Is it a tool, library, or framework? What I know is library is a collection of methods. Library is called by source code, while framework calls the source code.