mcp-patterns

Model Context Protocol (MCP) server patterns for building integrations with Claude Code. Triggers on: mcp server, model context protocol, tool handler, mcp resource, mcp tool.

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Review — 80%

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Validation — 10 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

92%

61%

Build a File Search MCP Server

MCP server project structure and Python server entry point

Criteria

Without context

With context

src layout

100%

server.py exists

100%

tools.py exists

pyproject.toml exists

100%

mcp.server import

25%

100%

stdio_server import

100%

list_tools decorator

100%

call_tool decorator

100%

call_tool return format

100%

unknown tool ValueError

100%

stdio_server startup

100%

uv Claude Desktop config

55%

100%

Without context: $0.3646 · 1m 39s · 25 turns · 31 in / 5,418 out tokens

With context: $0.4384 · 1m 34s · 24 turns · 28 in / 5,401 out tokens

100%

95%

Weather MCP Tool with Multiple Capabilities

MCP tool schema, error handling, and correct content return format

Criteria

Without context

With context

mcp.server import

100%

stdio_server import

100%

list_tools decorator

100%

tool schema fields

100%

call_tool decorator

100%

content return structure

100%

unknown tool ValueError

100%

stdio_server async context

100%

create_initialization_options

100%

asyncio.run entrypoint

100%

review_notes content format

50%

100%

Without context: $0.2663 · 1m 23s · 15 turns · 20 in / 4,990 out tokens

With context: $0.4653 · 1m 42s · 25 turns · 28 in / 5,583 out tokens

100%

Connecting a GitHub MCP Server to Claude Desktop

Claude Desktop configuration with uv and env var auth placement

Criteria

Without context

With context

Uses uv command

100%

uv run args

100%

--directory flag

100%

python -m invocation

100%

env block present

100%

token in env block

100%

explanation: uv rationale

100%

explanation: env placement rationale

100%

No shell export suggestion

100%

Without context: $0.2199 · 1m 8s · 14 turns · 20 in / 3,351 out tokens

With context: $0.3113 · 1m 8s · 17 turns · 701 in / 3,601 out tokens

Evaluated: about 18 hours ago
Agent: Claude Code

Table of Contents

Build a File Search MCP Server Weather MCP Tool with Multiple Capabilities Connecting a GitHub MCP Server to Claude Desktop

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