Think MCP Tool

Think MCP Tool

Structured reasoning for agentic AI with the 'think' tool via Model Context Protocol.

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Think MCP Tool provides an MCP (Model Context Protocol) server implementing the 'think' tool for structured reasoning in agentic AI workflows. Inspired by Anthropic's research, it enables AI agents to pause and explicitly record thoughts during complex, multi-step problem solving without altering the environment. The system enhances sequential decision-making, policy compliance, and tool output analysis, and offers advanced extensions for criticism, planning, and searching. Suitable for integration with Claude or other agentic large language models.

Key Features

Implements 'think' tool for explicit agent thought logging
Runs as a Model Context Protocol (MCP) server
Seamless integration with Claude and other agentic language models
Minimal and standards-based server architecture
Supports extension with advanced tools (criticize, plan, search)
Facilitates policy verification during reasoning
Assists in processing and analyzing tool outputs
Easy configuration for inclusion in agent toolchains
Inspired by industry research (Anthropic's 'think' tool)
Open source under MIT license

Use Cases

Enabling AI agents to explicitly pause and reflect during multi-step workflows
Improving reasoning in large language models lacking native structured reasoning skills
Analyzing outputs from sequential or chained tool calls
Ensuring model agent decisions comply with detailed policy guidelines
Enhancing transparency and backtracking in agentic problem-solving
Planning and critiquing decisions within agent workflows
Augmenting agentic AI with advanced capabilities like search and criticism
Integrating with agent platforms supporting the Model Context Protocol
Developing more robust evaluative frameworks for AI tool use
Researching improved reasoning patterns in agentic language models

README

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.

alt text

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]
  • 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

Star History

Star History Chart

Repository Owner

Rai220
Rai220

User

Repository Details

Language Python
Default Branch master
Size 484 KB
Contributors 1
License MIT License
MCP Verified Nov 12, 2025

Programming Languages

Python
100%

Tags

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