Comment by simonw

> Rovo's URL retrieval tool is insecure: there are no protections against opening a URL that has been dynamically created by the agent. Here, Rovo is manipulated to append sensitive data to an attacker's URL.

I think it was Anthropic that first introduced a pattern that completely locks this down: your URL retrieval tool should only work for URLs that have previously been typed into the conversation by a user or have been returned from a trusted tool.

If the agent itself concatenates a new URL together - with leaked data after a ? - you should block that from being fetched.

The great thing about this solution is it's deterministic. You don't need any extra AI in the max - you implement a URL fetching system that knows which sources it should check for a direct match on the URL before it makes that GET request.