What is the rmcp crate used for in this skill?

The rmcp crate is a Rust library used to build Model Context Protocol (MCP) servers, allowing AI assistants like Claude to invoke Rust functions as typed tools.

Does this guide cover automatic schema generation?

Yes, it provides patterns for using the #[tool] macro which automatically generates JSON schemas for tool parameters and return types using schemars.

How are errors handled in these MCP tools?

The skill teaches you to use Result return types and the thiserror crate to provide structured, descriptive error messages that the AI can understand and act upon.

Can I use complex structs as tool parameters?

Absolutely. The guide demonstrates how to use the #[tool(aggr)] attribute combined with Serde and JsonSchema to handle complex, nested data structures.

Rust MCP Tools Guide

Name: Rust MCP Tools Guide
Author: EmilLindfors

byEmilLindfors

API Development

Guides developers in creating type-safe Model Context Protocol (MCP) tools using the rmcp crate and Rust macros.

About

The Rust MCP Tools Guide is an essential resource for developers building high-performance, type-safe MCP servers. It provides comprehensive instruction on using the rmcp crate's macro system to expose Rust functions to AI assistants. This skill covers everything from basic tool declarations and parameter validation to advanced patterns like stateful session management, external API integration, and robust error handling using thiserror. By following these patterns, developers can ensure their tools have accurate JSON schemas and clear descriptions, making them more reliable and easier for Claude to use correctly.

Key Features

Detailed patterns for simple, optional, and complex aggregated parameters
Implementation guides for CRUD, validation, and external service integration
Type-safe async tool development with automatic JSON schema introspection
Best practices for error handling and result transformation in MCP contexts
Expert guidance on the #[tool] macro system for automated schema generation
0 GitHub stars

Use Cases

Architecting stateful backend services that maintain context across tool calls
Implementing complex data validation and sanitization for AI-invoked functions
Building a custom Rust-based MCP server to expose local system utilities to Claude

About

Key Features

Detailed patterns for simple, optional, and complex aggregated parameters
Implementation guides for CRUD, validation, and external service integration
Type-safe async tool development with automatic JSON schema introspection
Best practices for error handling and result transformation in MCP contexts
Expert guidance on the #[tool] macro system for automated schema generation
0 GitHub stars

Use Cases

Architecting stateful backend services that maintain context across tool calls
Implementing complex data validation and sanitization for AI-invoked functions
Building a custom Rust-based MCP server to expose local system utilities to Claude