Thank you for the clarification!

While reviewing the prompt's capabilities, I had an idea: implementing a Greasemonkey/Userscript-style system, where users could inject custom JavaScript or prompts based on URLs, could be a powerful way to enhance website interactions.

For instance, consider a banking website with a cumbersome data export process that requires extra steps to make the data usable. Imagine being able to add a custom button to their UI (or define a custom MCP function) specifically for that URL, which could automatically pull and format the data into a more convenient format for plain text accounting.