What does the “think” tool do?
It allows Claude to pause during response generation and add an explicit thinking step—with its own designated space—to reason about whether all necessary information is available before proceeding.
Think MCP Server
@MCP-Mirror
Basic information
About Think MCP Server
Mirror of
Think MCP Server config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"marcopesani_think-mcp-server": {
"command": "docker",
"args": [
"build",
"-t",
"think-mcp-server",
"."
]
}
}
}Think MCP Server tools
1Enables Claude to think about a problem or analyze information
Overview
What is think-mcp-server?
think-mcp-server is a minimal Model Context Protocol (MCP) server that provides Claude AI models with the "think" tool capability. Based on Anthropic’s research published on March 20, 2025, the "think" tool gives Claude a dedicated reasoning step during response generation to improve complex, multi‑step tool‑use tasks.
How to use think-mcp-server?
Install globally via npm install -g think-mcp-server or run with npx -y think-mcp-server. For Claude Desktop, add the server configuration to claude_desktop_config.json (MacOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%/Claude/). Similar configuration steps are provided for Cline, Cursor, and Docker. Once configured, include instructions in your prompts to tell Claude when and how to use the “think” tool.
Key features of think-mcp-server
- Implements one tool:
thinkwith a requiredthoughtstring parameter. - Communicates over stdio using the MCP protocol.
- Returns structured responses that AI assistants can process.
- Logs thinking steps without modifying the external environment.
- Based on Anthropic’s “think” tool research (March 2025).
Use cases of think-mcp-server
- Analyzing previous tool call outputs before acting.
- Following detailed guidelines in policy‑heavy environments.
- Sequential decision making where each action builds on previous ones.
Frequently asked questions
How do I install think-mcp-server?
You can install it globally via npm (`npm install -g think-mcp-server`) or run it on demand with `npx -y think-mcp-server`. Docker build and run instructions are also provided.
How do I configure it for Claude Desktop?
Add the following JSON to your `claude_desktop_config.json` file (located in `~/Library/Application Support/Claude/` on MacOS or `%APPDATA%/Claude/` on Windows): `{"mcpServers":{"think":{"command":"npx","args":["-y","think-mcp-server"]}}}`.
What performance improvements does the “think” tool provide?
Anthropic’s evaluations showed a 54% relative improvement on the τ‑Bench airline domain (pass^1 metric: 0.570 vs 0.370 baseline) and a 1.6% average improvement on SWE‑bench, along with enhanced consistency across trials.
What transport does think-mcp-server use?
The server runs as a standalone process and communicates over stdio using the Model Context Protocol. No authentication or additional transport is mentioned.
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