Claude's Managed Agents now fetch only a URL that already appeared in the session

According to the report, the web_fetch tool in Claude Managed Agents now fetches only URLs that have already appeared in the session, for example in the text of a user message or in a web_search result. The change is intended to prevent an agent that reads a poisoned document from calling out to a web address found inside it.

Headlines are indexed or machine translated, not independent verification of scientific results. Medical news is not clinical advice. Distinguish interstellar concepts from demonstrated space technology using the original source.