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claude-sdk-tool-creation

Create and register Python tools for Claude Agent SDK with MCP servers.

2|1|Updated Apr 4, 2026
Search Tags:#python#sdk#claude#agent#mcp#tools
One-click install
npx skills add https://github.com/Folken2/nuvel --skill claude-sdk-tool-creation
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: claude-sdk-tool-creation
Source: https://github.com/Folken2/nuvel/tree/main/nuvel/backends/claude_agent_sdk/skills/claude-sdk-tool-creation
Command: npx skills add https://github.com/Folken2/nuvel --skill claude-sdk-tool-creation

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill simplifies the process of exposing Python functions as tools to Claude Agent SDK agents, ensuring correct registration, naming, and error handling.

Core Features & Use Cases

  • Tool Registration: Provides the standard pattern for using the @tool decorator and creating MCP servers.
  • Error Handling: Defines the required return shape for tools to ensure Claude receives meaningful error feedback instead of silent failures.
  • Use Case: When building a custom agent, use this skill to correctly map your internal Python functions to Claude-accessible tools, including proper schema definition and qualified naming to avoid common integration bugs.

Quick Start

Use the claude-sdk-tool-creation skill to guide the implementation of a new tool function and its registration within an MCP server.

Frequently Asked Questions about claude-sdk-tool-creation

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

FAQPage Schema
How do I expose a Python function as a tool for Claude Agent SDK?▼

You expose Python functions as tools by applying the SDK's @tool decorator and registering them within an MCP server. This process maps internal functions to Claude-accessible tools using proper schema definitions and qualified naming conventions.

Why does my custom Claude agent tool fail silently without returning errors?▼

Custom Claude agent tools fail silently when they do not adhere to the required return shape for error handling. You must define proper error handling protocols to ensure Claude receives meaningful error feedback instead of silent failures during tool execution.

What is the correct naming convention for registering custom tools with an MCP server?▼

The correct naming convention for registering custom tools with an MCP server requires qualified naming. Adhering to the Claude Agent SDK's qualified naming conventions prevents common integration bugs and ensures accurate tool execution routing.

Can I use Python functions directly with Claude Agent SDK without writing a tool schema?▼

You cannot use Python functions directly with the Claude Agent SDK without defining a tool schema. Correctly mapping internal Python functions to Claude-accessible tools requires proper schema definition to allow the agent to understand expected parameters and outputs.

When do I need to create custom tools for Claude agents?▼

You need to create custom tools for Claude agents when building agent-based applications that require specific external capabilities. This skill facilitates the development and integration of custom tools within the Claude Agent SDK framework to expand agent functionality.

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