mcp-tool-management

mcp-tool-management is a skill for Claude Code, Codex from ntaffzii/Skill-Agents. It costs 61 tokens per session (1,188 once invoked), scanned A, original, MIT.

Instructions for designing, organizing, documenting, validating, and refactoring MCP tools. MCP, or Model Context Protocol, is a way to expose actions that an AI agent can call.

In plain words
What is it for?
Use them to create or revise tools for file operations, commands, APIs, media processing, web access, or other programmatic actions.
Why use it?
They help keep executable tools separate from guidance and workflows, making an agent project easier to maintain.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use them to create or revise tools for file operations, commands, APIs, media processing, web access, or other programmatic actions.

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Install with agentmods
npx agentmods add skills/ntaffzii/skill-agents/mcp-tool-management
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add ntaffzii/Skill-Agents --skill mcp-tool-management
Clone the repo
git clone --depth 1 https://github.com/ntaffzii/Skill-Agents

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcp-tool-management

README.md
[![agentmods](https://agentmods.dev/badge/skills/ntaffzii/skill-agents/mcp-tool-management/github.svg)](https://agentmods.dev/skills/ntaffzii/skill-agents/mcp-tool-management)
Your own site
<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/mcp-tool-management"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/mcp-tool-management/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for mcp-tool-management

Your own site · 80×15
<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/mcp-tool-management"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/mcp-tool-management.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,188 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00061 $0.01188
Opus 5 $0.00030 $0.00594
Sonnet 5 $0.00012 $0.00238
Haiku 4.5 $0.00006 $0.00119

Measured 10d ago against content hash 7c893f58ce4e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

mcp-tool-management 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 10d 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.

skills/misc/mcp-tool-management/SKILL.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP Tool Management

Use this skill to keep tools separate from skills while making them work together.

Repository Model

  • skills/ tells the agent how to think and behave.
  • workflows/ tells the agent what order to do work in.
  • mcp-tools/ contains executable actions.
  • data/tools.json indexes tool groups, modules, and the skills/workflows that use them.

Decision Rule

Make something a tool when it performs an action that benefits from code:

  • Reading or searching files
  • Editing files
  • Running tests or commands
  • Calling APIs
  • Processing media
  • Fetching web pages
  • Scoring or transforming prompts

Keep something as a skill when it is judgment, policy, order of operations, or domain guidance.

Make something a workflow when it combines multiple skills and tools into a repeatable job.

Tool Design Rules

  • One tool should do one narrow job.
  • Inputs should be typed and explicit.
  • Outputs should be structured and easy for an agent to inspect.
  • Errors should explain what failed and what input caused it.
  • Tools should not hide broad multi-step workflows.
  • Tools should not duplicate long SKILL.md instructions.
  • Dangerous operations should require explicit confirmation or be split into inspect/apply phases.
  • filesystem.py - list, read, search, and inspect files.
  • registry.py - inspect available tools, workflows, runtime capabilities, and policy.
  • toolsets.py - route agents to curated tool groups by job type.
  • audit.py - inspect audit logs, policy denials, and recent tool activity.
  • mcp_security_audit.py - inspect local MCP tool risk and policy coverage.
  • security_scanner.py - scan repository secrets, dangerous commands, env exposure, and dependency risks.
  • project.py - inspect project stack, package scripts, important files, and health.
  • docs.py - find documentation, read README/docs files, and build context bundles.
  • package.py - inspect package managers, manifests, lockfiles, and dependencies.
  • api.py - inspect API route files, endpoints, OpenAPI specs, and API config hints.
  • database.py - inspect schema files, migrations, ORM models, and database config hints.
  • config.py - inspect config files, env keys, examples, and secret hygiene signals.
  • test_inspection.py - inspect test files, frameworks, and source-to-test hints.
  • task.py - scan task markers and roadmap files.
  • dependency_risk.py - inspect offline dependency risk signals.
  • release.py - inspect release files, versions, and readiness.
  • backup.py - create allowed-root zip snapshots before broad edits.
  • structured_data.py - read, validate, inspect, and patch JSON/YAML/TOML safely.
  • memory.py - store, search, and summarize local project memories.
  • memory_context.py - save typed decisions, preferences, bug lessons, and context packs.
  • github.py - inspect GitHub workflow metadata and draft PR text.
  • browser.py - inspect browser readiness and plan local UI smoke checks.
  • sandbox.py - create temporary workspaces and compile snippets safely.
  • git.py - inspect status, diffs, branches, and commits without mutation.
  • git_control.py - create/switch branches, stage/unstage, and commit through allowlisted commands.
  • playwright_tools.py - inspect live pages and capture screenshots when Playwright is available.
  • playwright_actions.py - click, fill, assert text, inspect console/network failures, and run UI checks.
  • code_editing.py - patch, format, diff, and test code.
  • validation.py - plan and run allowlisted test, lint, typecheck, and build commands.
  • prompt_improver.py - analyze, improve, score, and template prompts.
  • web.py - search, fetch, extract, and summarize sources.
  • media.py - inspect and process image, audio, and video files.
  • system.py - inspect environment and run validation commands.

Read the full file on GitHub · 121 lines

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. 10d ago First seen · 121 lines · 61 tokens per session scan A 7c893f58ce4e

Subscribe to this mod's changes

mcp-tool-management is a skill published in the GitHub repository ntaffzii/Skill-Agents (4 stars, last pushed yesterday), licensed MIT. It adds 61 tokens to every session and 1,188 once invoked, about $0.0003 per session on Opus 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.

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