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tool-reference changedagents-and-tools/tool-use/tool-reference

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1111Anthropic provides two kinds of tools: **server tools** that execute on Anthropic's infrastructure, and **client tools** where Anthropic defines the schema but your application handles execution. Both kinds appear in your request's `tools` array alongside any user-defined tools.
1212 
13| Tool | `type` | Execution | Status |
14| -------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------- | --------- | ------------------------------------------------------------------ |
15| [Web search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) | `web_search_20260318` `web_search_20260209` `web_search_20250305` | Server | GA |
16| [Web fetch tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) | `web_fetch_20260318` `web_fetch_20260309` `web_fetch_20260209` `web_fetch_20250910` | Server | GA |
17| [Code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool) | `code_execution_20260521` `code_execution_20260120` `code_execution_20250825` | Server | GA |
18| [Advisor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool) | `advisor_20260301` | Server | Beta: `advisor-tool-2026-03-01` |
19| [Tool search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool) | `tool_search_tool_regex_20251119` `tool_search_tool_bm25_20251119` | Server | GA |
20| [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector) | `mcp_toolset` | Server | Beta: `mcp-client-2025-11-20` |
21| [Memory tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/memory-tool) | `memory_20250818` | Client | GA |
22| [Bash tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/bash-tool) | `bash_20250124` | Client | GA |
23| [Text editor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/text-editor-tool) | `text_editor_20250728` `text_editor_20250124` | Client | GA |
24| [Computer use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) | `computer_toolset_20260801` `computer_20251124` `computer_20250124` | Client | GA Beta: `computer-use-2025-11-24` Beta: `computer-use-2025-01-24` |
25| [Browser use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool) | `browser_toolset_20260801` | Client | GA |
13| Tool | `type` | Execution | [Beta header](https://platform.claude.com/docs/en/api/beta-headers) |
14| -------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------- | --------- | ------------------------------------------------------------------- |
15| [Web search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool) | `web_search_20260318` `web_search_20260209` `web_search_20250305` | Server | None |
16| [Web fetch tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-fetch-tool) | `web_fetch_20260318` `web_fetch_20260309` `web_fetch_20260209` `web_fetch_20250910` | Server | None |
17| [Code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool) | `code_execution_20260521` `code_execution_20260120` `code_execution_20250825` | Server | None |
18| [Advisor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool) | `advisor_20260301` | Server | `advisor-tool-2026-03-01` |
19| [Tool search tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool) | `tool_search_tool_regex_20251119` `tool_search_tool_bm25_20251119` | Server | None |
20| [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector) | `mcp_toolset` | Server | `mcp-client-2025-11-20` |
21| [Memory tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/memory-tool) | `memory_20250818` | Client | None |
22| [Bash tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/bash-tool) | `bash_20250124` | Client | None |
23| [Text editor tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/text-editor-tool) | `text_editor_20250728` `text_editor_20250124` | Client | None |
24| [Computer use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool) | `computer_toolset_20260801` `computer_20251124` `computer_20250124` | Client | None `computer-use-2025-11-24` `computer-use-2025-01-24` |
25| [Browser use tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/browser-use-tool) | `browser_toolset_20260801` | Client | None |
2626 
2727For model compatibility, see each tool's page. Supported models vary by tool and by tool version.
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4040* **Model-keyed:** `text_editor_20250728` is for Claude 4 and later models and `text_editor_20250124` is for earlier models. The version you use depends on the model you target.
4141* **Variant, not version:** `tool_search_tool_regex_20251119` and `tool_search_tool_bm25_20251119` are two search algorithms released together. Neither supersedes the other.
4242* **Legacy:** `code_execution_20250522` supports only Python. `code_execution_20250825` adds Bash and file operations.
43* **Successor:** `computer_toolset_20260801` is the generally available successor to the beta `computer_20251124` and `computer_20250124` versions, which remain available for existing integrations and for models that don't support the toolset ([Earlier tool versions](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool#earlier-tool-versions)). `browser_toolset_20260801` is the first version of the browser use tool. Both are [client toolsets](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-reference#client-toolsets).
43* **Successor:** `computer_toolset_20260801` is the stable successor to the beta `computer_20251124` and `computer_20250124` versions, which remain available for existing integrations and for models that don't support the toolset ([Earlier tool versions](https://platform.claude.com/docs/en/agents-and-tools/tool-use/computer-use-tool#earlier-tool-versions)). `browser_toolset_20260801` is the first version of the browser use tool. Both are [client toolsets](https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-reference#client-toolsets).
4444 
4545The `mcp_toolset` type is not date-versioned; versioning is carried in the `anthropic-beta` header instead.
4646 
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