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Server-side tools for WebSearch, WebFetch, CodeExecution, and AnthropicMCP are now available through LLM's -T interface or Python tools=, replacing the previous -o web_search* options.

New server-side tools replace the older web_search options, accessible via the -T interface. ✦ AI generated

llm-anthropic maintainer · Simon Willison's Weblog · 2026-08-04 · original ↗

Added server-side tools for WebSearch, WebFetch, CodeExecution, and AnthropicMCP, available through LLM's -T interface or Python tools=. The previous -o web_search* options have been removed in favor of -T WebSearch. #79

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✳ AnthropicMCP ✳ LLM ✳ WebSearch

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Context · 1

Anthropic's web_fetch tool defends against exfiltration by only allowing navigation to exact URLs the user typed or that came back from web_search.Simon Willison · Simon Willison's Weblog · conf 60%

Extends · 2

Three new Claude 5 models—claude-fable-5, claude-sonnet-5, and claude-opus-5—are now available in llm-anthropic 0.26.llm-anthropic maintainer · Simon Willison's Weblog · conf 70%LLM now supports server-side tools from multiple providers, including OpenAI's CodeInterpreter and WebSearch, and Anthropic's WebSearch, WebFetch, CodeExecution, and MCP integration.Simon Willison · Simon Willison's Weblog · conf 70%

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provides context → With llm>=0.32, reasoning, tool calls, tool results, and server-side tool results now stream as typed events, and reasoning displays to standard error by default.llm-anthropic maintainer · Simon Willison's Weblog