Checked fact 106612 Oct 2026Agents and apps

The release notes say that a web_fetch call for a URL on a host that allowed_hosts does not match "returns a url_not_allowed error result to the agent", and that "web_search omits results from such hosts".

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The exact words it rests on

A web_fetch call for a URL on a host that allowed_hosts does not match returns a url_not_allowed error result to the agent. web_search omits results from such hosts.

What the source said when we opened it, on 12 Oct 2026.

The source

Claude Platform release notes
Anthropic

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Checked

Checked by the notis newsroom on 12 Oct 2026, against the source above.

In the story

Anthropic's Claude Managed Agents web fetch tool now fetches only URLs that have already appeared in the session. 12 Oct 2026

Cite this fact

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In a sentence

“The release notes say that a web_fetch call for a URL on a host that allowed_hosts does not match "returns a url_not_allowed error result to the agent", and that "web_search omits results from such hosts".” ai notis, checked 12 Oct 2026. Source: Claude Platform release notes (Anthropic). https://ainotis.com/c/1066

As a reference (APA style)

ai notis. (2026, October 12). The release notes say that a web_fetch call for a URL on a host that allowed_hosts does not match "returns a url_not_allowed error result to the agent", and that "web_search omits results from such hosts" [Checked claim 1066]. ai notis. https://ainotis.com/c/1066

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