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mcp_python_toolbox: Instructions file for Claude Code

CLAUDE.md

mcp_python_toolbox CLAUDE.md is an instructions file for Claude Code from gianlucamazza/mcp_python_toolbox. It costs 253 tokens per session, scanned A, original, MIT.

Development instructions for MCP Python Toolbox, a Python project that provides tools through MCP. They describe setup, testing, type checking, linting, formatting, and coding conventions.

In plain words
What is it for?
Use them when developing the project to install dependencies, run tests, check types, lint, format, and follow its Python naming and documentation rules.
Why use it?
They make the project’s required checks and style clear, reducing inconsistent code and avoidable build or review problems.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is gianlucamazza/mcp_python_toolbox's own configuration. It tells Claude Code how to work on mcp_python_toolbox itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp_python_toolbox configures →

not rated 9repo 27d ago A scan 253 tokens original MIT archived
View source ↗ gianlucamazza/mcp_python_toolbox
Reuse

Borrowing it

Nothing to install: this file belongs to gianlucamazza/mcp_python_toolbox. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/gianlucamazza/mcp_python_toolbox/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/gianlucamazza/mcp_python_toolbox

Made for: Claude Code.

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README.md
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Per session 253 This file is loaded in full into every session.
When invoked 253 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00253 $0.00253
Opus 5.5 $0.00101 $0.00101
Sonnet 5.5 $0.00051 $0.00051
Haiku 4.5 $0.00025 $0.00025

Measured 2mo ago against content hash bd157d487152, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp_python_toolbox CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 22 lines

What it actually says

MCP Python Toolbox - Development Guidelines

Build/Test/Lint Commands

  • Install dev dependencies: pip install -e ".[dev]"
  • Run all tests: pytest
  • Run single test: pytest tests/path/to/test_file.py::test_function_name -v
  • Type checking: mypy src/mcp_python_toolbox
  • Linting: pylint src/mcp_python_toolbox
  • Format code: black src/mcp_python_toolbox

Code Style Guidelines

  • Line length: 100 characters (Black configuration)
  • Python version: 3.7+
  • Formatting: Use Black for automatic formatting
  • Imports: Standard library first, then third-party, then local modules
  • Types: All functions must have type annotations (disallow_untyped_defs=true)
  • Naming:
    • Classes: PascalCase
    • Functions/variables: snake_case
    • Constants: UPPER_CASE
  • Error handling: Use specific exceptions with descriptive error messages
  • Documentation: Docstrings for all modules, classes, and functions using """triple quotes"""
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 22 lines · 253 tokens per session scan A bd157d487152

Subscribe to this mod's changes

mcp_python_toolbox CLAUDE.md is an instructions file published in the GitHub repository gianlucamazza/mcp_python_toolbox (9 stars, last pushed 27d ago), licensed MIT. It adds 253 tokens to every session, about $0.0010 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Pythonclaudedeveloper-toolsmcpmodel-context-protocolstdio
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