◇ Could this help me?
Yes. These are standard, correct SSRF mitigations (egress allowlisting, pinned resolution that defeats redirect and rebinding tricks, and opaque error responses) for exactly the failure mode agents introduce when they fetch user-supplied URLs. General practice: applies to any AI agent or server-side fetcher with network access, regardless of stack.
Audit this codebase for every place an AI agent or server-side code fetches a URL that originates from user input. For each one, check whether outbound requests are restricted to an approved domain allowlist, whether internal or private addresses are blocked, whether the resolved address is pinned and revalidated on redirects, and whether failed fetches return one generic error. Report the gaps with proposed fixes and wait for approval before changing code.