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In Claude Managed Agents, the web_fetch tool now fetches only URLs that have already appeared in the session

UpdateyesterdayUnverifiedAdded Oct 8, 2026

In Claude Managed Agents, the web_fetch tool now fetches only URLs that have already appeared in the session, for example in the text of a user message, in a web_search result, or in a page that web_fetch returned earlier. This reduces the risk of data exfiltration.

Topics: AI agents, LLMs, MCP

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Also shipped on Oct 7, 2026

Anthropic in October 2026