mcp-builder

Guide creation of MCP servers in Python or TypeScript with structured tool design.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/freitassph/aiox-core --skill mcp-builder-freitassph
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mcp-builder
Source: https://github.com/freitassph/aiox-core/tree/main/.claude/skills/mcp-builder
Command: npx skills add https://github.com/freitassph/aiox-core --skill mcp-builder-freitassph

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps you design and implement high-quality MCP (Model Context Protocol) servers so LLM agents can reliably use well-structured tools to complete real-world tasks with minimal confusion and wasted context.

Core Features & Use Cases

  • Workflow-first tool design: Build tools that support complete agent workflows, not just thin API wrappers.
  • Context-optimized outputs: Make responses concise by default, support detailed vs concise modes, and reduce token waste.
  • LLM-friendly reliability: Create actionable, educational error messages and strong input/output schemas for predictable tool use.
  • Language-specific implementation guidance: Follow best practices for Python (FastMCP) and Node/TypeScript (MCP SDK).
  • Quality and evaluation support: Use checklists and create evaluation sets that measure whether agents can actually use your tools effectively.

Quick Start

Use this skill to plan and implement an MCP server by reading the MCP protocol spec, then drafting an implementation plan for your tools before coding.

Frequently Asked Questions about mcp-builder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build an MCP server for LLM agents to use external APIs?

Build an MCP server by reading the protocol spec, drafting an implementation plan, and designing workflow-first tools with strong input/output schemas. This ensures LLM agents can reliably use external APIs with minimal confusion and wasted context.

What is the best way to design MCP tool schemas for LLM agents?

Design MCP tool schemas by creating complete agent workflows rather than thin API wrappers, using context-optimized outputs with concise and detailed modes. This approach produces LLM-friendly, predictable responses and reduces token waste during agent execution.

Does this MCP server guidance support both Python and Node TypeScript?

Yes, this MCP server guidance supports Python using FastMCP and Node/TypeScript using the MCP SDK. It provides language-specific implementation best practices for integrating APIs and designing schemas in both environments.

How do I evaluate if LLM agents can effectively use my MCP tools?

Evaluate LLM agent tool usage by creating evaluation sets and using quality checklists that measure deterministic performance. This verifies whether agents can actually complete real-world tasks using your structured MCP server tools.

Why do my LLM agents get confused when using thin API wrappers as MCP tools?

LLM agents get confused using thin API wrappers because they lack workflow context and produce token-heavy, unstructured responses. Building workflow-first MCP tools with actionable error messages and context-optimized outputs solves this reliability issue.

Can I create concise and detailed output modes for MCP server tool responses?

Yes, you can create context-optimized MCP server tool responses by supporting both concise and detailed output modes. Making responses concise by default reduces token waste while still allowing detailed responses when needed for LLM processing.