The Think Tool MCP server provides a dedicated thinking space for LLMs to perform complex reasoning, break down problems into steps, verify policy adherence, synthesize information from multiple tool calls, and maintain context across long reasoning chains. Built as a TypeScript MCP server, it aims for lightweight overhead and seamless integration with MCP-enabled platforms such as Cursor, Claude Desktop, and other MCP-compatible environments. The server exposes a think tool that accepts a single 'thought' string as its input, and LLMs will automatically use this tool when structured reasoning is required. The tool does not retrieve new information or enact changes; it simply records the structured thinking process to guide subsequent actions. This approach aligns with Anthropic's think tool research, which demonstrates performance benefits in tasks requiring complex reasoning and policy adherence. The project includes a CLI entry point and a dedicated MCP server implementation, with development and build workflows (npm install, npm run build, npm start) and guidance for contributing. It is designed to be used with MCP SDKs and TypeScript tooling for improved developer experience.