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Think MCP Tool

Think MCP Tool

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github.com/Rai220AI & Agents107Updated 34w ago
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About Think MCP Tool

Think MCP Tool is an MCP server that provides a "think" tool for structured reasoning in agentic AI workflows. The tool does not change the environment or data; it appends each thought to a log. It suits agents that need to reason over tool outputs or check policy compliance during multi-step tasks.

Key features

  1. 01Think tool that logs structured thoughts
  2. 02Does not modify environment or database
  3. 03Optional advanced mode with extra tools
  4. 04Lightweight implementation based on mcp[cli]

Use cases

  1. 01Analyzing the output of previous tool calls
  2. 02Checking actions against policy guidelines
  3. 03Working through sequential decisions with backtracking

MCP support

This project is an MCP server that exposes a think tool to MCP clients; advanced mode also adds criticize, plan and search tools.

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "think": {
      "command": "uvx",
      "args": [
        "think-mcp"
      ]
    }
  }
}
Run commanduvx think-mcp

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
pypithink-mcp

Tools

No tool list yet

Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.

Details

From the project 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

Think Tool MCP server

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

Comments

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An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.