With the filesystem MCP server, how can I write to a file in a way that, if it does not exist, creates the file, then adds the content to it; if it exists, updates the file by appending the new content, rather than overwriting the existing content in the file? Is it possible? Does it have such a tool?

something like write_or_update_file or append_file with creation of the file if it doesn't exist, and keeping the previous content. or even an option for write_file to append the new content in the existing file, not overwriting . . .