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Think MCP

Community AI and agents

Improve agent reasoning with the think tool described by Anthropic.

Source code Documentation

What can you do with Think MCP?

  • Implements the "think" tool as described in Anthropic's research
  • Minimal, standards-based MCP server using [mcp[cli]](https://pypi.org/project/mcp/)
  • Ready for integration with Claude or other agentic LLMs

Install

The installation steps are in the documentation below. Documentation

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Think MCP Tool
  2. What is the "think" tool?
  3. Features
  4. Usage
  5. Tool definition
  6. Advanced mode
  7. Reference
  8. License

Think MCP Tool

Think MCP is an implementation of an MCP (Model Context Protocol) server that provides a "think" tool for structured reasoning in agentic AI workflows. This project is inspired by the Anthropic engineering article: The "think" tool: Enabling Claude to stop and think in complex tool use situations.

According to the referenced article, adding the think tool can lead to improved evaluation metrics by enabling reasoning capabilities even in models that do not natively possess advanced reasoning skills.

What is the "think" tool?

The "think" tool allows an AI agent to pause and record an explicit thought during complex reasoning or multi-step tool use. It does not change the environment or database, but appends the thought to the log, helping the agent process information, backtrack, or comply with detailed policies.

This approach is especially useful for:

  • Tool output analysis (processing results of previous tool calls)
  • Policy-heavy environments (verifying compliance with guidelines)
  • Sequential decision making (where each step builds on previous ones)

Features

  • Implements the "think" tool as described in Anthropic's research
  • Minimal, standards-based MCP server using [mcp[cli]](https://pypi.org/project/mcp/)
  • Ready for integration with Claude or other agentic LLMs

Usage

MCP server configuration

Add this MCP server to your facorite agent.

"mcpServers": {
    "think-mcp": {
        "command": "uvx",
        "args": ["think-mcp"],
        "enabled": true
    }
}

Tool definition

The "think" tool is defined as:

  • Input: thought (string) — A thought to think about.
  • Behavior: Appends the thought to the log for structured reasoning.

Advanced mode

Adds aditional tools for your agent:

  • criticize
  • plan
  • search
"mcpServers": {
    "think-mcp": {
        "command": "uvx",
        "args": ["think-mcp", "--advanced"],
        "enabled": true,
        "env": {
            "TAVILY_API_KEY": ... YOUR TAVILY API KEY HERE ...
        }
    }
}

Reference

License

MIT License — see LICENSE

Frequently asked questions

What is Think MCP?

Improve agent reasoning with the think tool described by Anthropic.

How do I install Think MCP?

Follow the installation steps in its documentation, shown on this page and in its repository.

Is Think MCP open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Think MCP?

It is published by Rai220. AI.tn lists it but does not maintain or endorse it.

From the community awesome-mcp-servers lists and the project's GitHub repository. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.