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Agent skill

Agent Tools

by VectorSpaceLab in VectorSpaceLab/AREX-Skill

A skill your agent uses when configuring LiteLLM for MCP tools, A2A agents, Claude Code/Cursor agent gateway traffic, MCP auth/OAuth, tool permissions, semantic filtering, or agent-specific proxy…

Custom licenceAuto-check passedAgent Workflows

Install Agent Tools

skills CLI
$ npx skills add VectorSpaceLab/AREX-Skill --skill agent-tools -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install VectorSpaceLab/AREX-Skill agent-tools --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/VectorSpaceLab/AREX-Skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/repositories/repo-skills/litellm/sub-skills/agent-tools .claude/skills/agent-tools && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
agent-tools
GitHub stars
328
Token cost
~1.2k tokens
SKILL.md length
420 words
Files
5 (incl. scripts, references)
Skills in repo
157
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when configuring LiteLLM for MCP tools, A2A agents, Claude Code/Cursor agent gateway traffic, MCP auth/OAuth, tool permissions, semantic filtering, or agent-specific proxy…

  • Configuring LiteLLM for MCP tools
  • SKILL.md covers Choose the workflow, Minimal MCP gateway config, Minimal A2A agent config and Validation checklist, plus 1 more section
  • Runs Python scripts from its folder; needs ANTHROPIC_API_KEY and LITELLM_MASTER_KEY
  • Claude Code/Cursor agent gateway traffic

What it does

Agent Tools is an agent skill from VectorSpaceLab/AREX-Skill. Use when configuring LiteLLM for MCP tools, A2A agents, Claude Code/Cursor agent gateway traffic, MCP auth/OAuth, tool permissions, semantic filtering, or agent-specific proxy routes.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts and reference files (for example `references/a2a-workflows.md`, `references/agent-gateway-troubleshooting.md` and `references/mcp-workflows.md`).

It sits in Agent Workflows, covering MCP servers and Model routing and gateways. It works with Model Context Protocol. The repository describes itself as: A Skill Library for Automated Machine Learning.

When your agent uses it

  • Configuring LiteLLM for MCP tools
  • Claude Code/Cursor agent gateway traffic
  • Tool permissions
  • Semantic filtering

Example prompts

  • “/agent-tools”

Requirements

  • Python 3
  • A credential in ANTHROPIC_API_KEY
  • A credential in LITELLM_MASTER_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit ac3fe1a. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • ANTHROPIC_API_KEY
    • LITELLM_MASTER_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Agent Tools loads about 1.2k tokens when it runs, and up to ~6.6k if it reads all its reference files. Until then it costs about 49 tokens; SKILL.md has 420 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 420 words (~1,168 tokens).

“Use this sub-skill for LiteLLM workflows that expose tools or agents through the proxy. Route generic proxy setup to ../proxy-server/SKILL.md, provider endpoint details to ../providers-and-endpoints/SKILL.md, and SDK-only tools or tool_choice completion parameters to ../sdk-core/SKILL.md.”

— opening of SKILL.md by VectorSpaceLab, Custom licence
name
agent-tools
disable-model-invocation
true
metadata.disco-role
operating
license
NOASSERTION

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (scripts, references) in skills/repositories/repo-skills/litellm/sub-skills/agent-tools of VectorSpaceLab/AREX-Skill.

  • SKILL.md
  • references/a2a-workflows.md
  • references/agent-gateway-troubleshooting.md
  • references/mcp-workflows.md
  • scripts/inspect_mcp_tools.py

Open the folder on GitHubat commit ac3fe1a

Compare with similar skills

Agent Tools next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Agent Tools compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Agent Tools this skillVectorSpaceLab/AREX-Skill328—~1.2kAutomated safety check: PassCustom licence
Deliberationantonbabenko/deliberation169—~3.8kAutomated safety check: PassMIT
Famulor Skillaiskillstore/marketplace430—~2.4kAutomated safety check: PassMIT
MCP Server Builderanthropics/skills180k64 repos~2.3kAutomated safety check: PassApache-2.0
MCP Server BuildershareAI-lab/learn-claude-code78k5 repos~1.2kAutomated safety check: PassMIT
MCP Integration for Pluginsanthropics/claude-plugins-official38k11 repos~3.1kAutomated safety check: PassApache-2.0

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Works with

Categories

Questions about Agent Tools

What does Agent Tools do?

A skill your agent uses when configuring LiteLLM for MCP tools, A2A agents, Claude Code/Cursor agent gateway traffic, MCP auth/OAuth, tool permissions, semantic filtering, or agent-specific proxy…. Agent Tools is an agent skill from VectorSpaceLab/AREX-Skill. Use when configuring LiteLLM for MCP tools, A2A agents, Claude Code/Cursor agent gateway traffic, MCP auth/OAuth, tool permissions, semantic filtering, or agent-specific proxy routes.

When should I use Agent Tools?

Agent Tools fits situations like: configuring LiteLLM for MCP tools; Claude Code/Cursor agent gateway traffic; tool permissions; semantic filtering.

How do I install Agent Tools in Claude Code?

Run `npx skills add VectorSpaceLab/AREX-Skill --skill agent-tools -a claude-code`. Or copy the skill folder (skills/repositories/repo-skills/litellm/sub-skills/agent-tools in VectorSpaceLab/AREX-Skill) into .claude/skills/agent-tools in your project. Claude Code loads it when a task matches its description.

How do I install Agent Tools in Codex?

Run `npx skills add VectorSpaceLab/AREX-Skill --skill agent-tools -a codex`. Or copy the skill folder (skills/repositories/repo-skills/litellm/sub-skills/agent-tools in VectorSpaceLab/AREX-Skill) into .agents/skills/agent-tools in your project. Codex loads it when a task matches its description.

Can I use Agent Tools in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add VectorSpaceLab/AREX-Skill --skill agent-tools -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/agent-tools, .gemini/skills/agent-tools, .github/skills/agent-tools and .opencode/skills/agent-tools in your project.

What does Agent Tools need to run?

Going by SKILL.md and its folder, Agent Tools needs Python for the scripts in its folder and credentials named ANTHROPIC_API_KEY and LITELLM_MASTER_KEY. Our summary lists: Python 3; A credential in ANTHROPIC_API_KEY; A credential in LITELLM_MASTER_KEY.

Does Agent Tools access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Agent Tools safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Agent Tools use?

Agent Tools has a licence file (declared in SKILL.md) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Agent Tools use?

About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 5.5k tokens, read only when the agent opens those files.

What are the alternatives to Agent Tools?

Skills that share tags, products or a category with Agent Tools: Deliberation (antonbabenko/deliberation, 169 stars), Famulor Skill (aiskillstore/marketplace, 430 stars), MCP Server Builder (anthropics/skills, 180k stars) and MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Agent Tools?

VectorSpaceLab (a GitHub organization) maintains it in VectorSpaceLab/AREX-Skill, which has 328 GitHub stars. The repository holds 157 skills in this directory. The repository was last updated on September 3, 2026.

Source: VectorSpaceLab/AREX-Skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.