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ChenReuven

MCP TypeScript Simple Template

by ChenReuven

MCP TypeScript Simple Template

A simple TypeScript template for building Model Context Protocol (MCP) servers. This project provides a foundation for creating custom MCP tools that can be integrated with AI systems.

Overview

This template implements a basic MCP server with a sample BMI calculator tool. It demonstrates how to:

  • Set up an MCP server in TypeScript

  • Define and implement MCP tools with input validation using Zod

  • Connect the server to standard I/O for communication

Related MCP server: MCP Server Python Template

Prerequisites

  • Node.js (v20 or higher recommended)

  • npm or yarn

Installation

  1. Clone this repository

  2. Install dependencies:

npm install

Project Structure

  • index.ts - Main server implementation with sample tool

  • package.json - Project dependencies and scripts

  • tsconfig.json - TypeScript configuration

Usage

Building and Running

Build and start the server:

npm start

This will compile the TypeScript code and start the MCP server.

Development

For development, you can:

  1. Modify index.ts to add your own tools

  2. Run the build command to compile:

npm run build

Creating Custom Tools

To create a new tool, follow this pattern in index.ts:

server.tool(
  "your-tool-name",
  {
    // Define input schema using Zod
    paramName: z.string(),
    // Add more parameters as needed
  },
  async ({ paramName }) => ({
    content: [{
      type: "text",
      text: "Your tool's response"
    }]
  })
);

Dependencies

  • @modelcontextprotocol/sdk - Core MCP SDK

  • zod - Schema validation

  • dotenv - Environment variable management

  • typescript - TypeScript compiler

License

ISC

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Available Tools

2 tools
calculate-bmiD
ParametersJSON Schema
NameRequiredDescriptionDefault
heightMYes
weightKgYes

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

echoD
ParametersJSON Schema
NameRequiredDescriptionDefault
textYes

TDQS

D1/5.0
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

TDQS

D1.5/5.0
Disambiguation5/5

The two tools have clearly distinct purposes: calculate_bmi is for health-related calculations, while echo is for text repetition. There is no overlap or ambiguity between them, making it easy for an agent to choose the right tool.

Naming Consistency2/5

The naming is inconsistent: calculate_bmi uses kebab-case, while echo uses lowercase without a clear pattern. There is no consistent verb_noun convention, and the styles are mixed, though the names are still readable.

Tool Count2/5

With only 2 tools, the server feels too thin for a general-purpose template. It lacks depth and variety, suggesting an incomplete or minimal implementation that doesn't fully cover a meaningful domain.

Completeness1/5

The server is severely incomplete; it only offers two unrelated tools with no descriptions, making it impossible to assess domain coverage. There are obvious gaps, and it doesn't support any coherent workflow or lifecycle.

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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Looking for Admin?

If you are the server author, to access and configure the admin panel.

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