Allowed tools
The following is the list of all currently available tools and that can be provided to the array of tools to be displayed on the UI in the allowed_tools
option.
upload
The tool that serves as submit button and that calls the upload function
add_file
The tool for displaying the default UI to add new file
added_files_count
The file counter display tool
clear_files
The tool that serves as a clear button and that clear all the files