Agent skill

Agenticx Tool Creator

Guide for creating custom tools in AgenticX including function decorator tools, MCP tool integration, tool registries, and remote tool access.

Apache-2.0Auto-check passedAgent Workflows

Install Agenticx Tool Creator

skills CLI

$ npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a claude-code

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

GitHub CLI

$ gh skill install DemonDamon/AgenticX agenticx-tool-creator --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/DemonDamon/AgenticX.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agenticx/skills/agenticx-tool-creator .claude/skills/agenticx-tool-creator && 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/

Paste into Claude Code

Install the "agenticx-tool-creator" agent skill from https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator into .claude/skills/agenticx-tool-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agenticx-tool-creator", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install DemonDamon/AgenticX agenticx-tool-creator --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DemonDamon/AgenticX.git skills-src && mkdir -p .agents/skills && cp -r skills-src/agenticx/skills/agenticx-tool-creator .agents/skills/agenticx-tool-creator && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "agenticx-tool-creator" agent skill from https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator into .agents/skills/agenticx-tool-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agenticx-tool-creator", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install DemonDamon/AgenticX agenticx-tool-creator --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DemonDamon/AgenticX.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/agenticx/skills/agenticx-tool-creator .cursor/skills/agenticx-tool-creator && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "agenticx-tool-creator" agent skill from https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator into .cursor/skills/agenticx-tool-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agenticx-tool-creator", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/DemonDamon/AgenticX.git --path agenticx/skills/agenticx-tool-creator

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install DemonDamon/AgenticX agenticx-tool-creator --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DemonDamon/AgenticX.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/agenticx/skills/agenticx-tool-creator .gemini/skills/agenticx-tool-creator && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "agenticx-tool-creator" agent skill from https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator into .gemini/skills/agenticx-tool-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agenticx-tool-creator", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install DemonDamon/AgenticX agenticx-tool-creator

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/DemonDamon/AgenticX.git skills-src && mkdir -p .github/skills && cp -r skills-src/agenticx/skills/agenticx-tool-creator .github/skills/agenticx-tool-creator && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "agenticx-tool-creator" agent skill from https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator into .github/skills/agenticx-tool-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agenticx-tool-creator", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install DemonDamon/AgenticX agenticx-tool-creator --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/DemonDamon/AgenticX.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/agenticx/skills/agenticx-tool-creator .opencode/skills/agenticx-tool-creator && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "agenticx-tool-creator" agent skill from https://github.com/DemonDamon/AgenticX/tree/main/agenticx/skills/agenticx-tool-creator into .opencode/skills/agenticx-tool-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "agenticx-tool-creator", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: agenticx-tool-creator
GitHub stars: 315
Token cost: ~976 tokens
SKILL.md length: 214 words
Files: 1
Skills in repo: 17
Repo updated: Oct 9, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Guide for creating custom tools in AgenticX including function decorator tools, MCP tool integration, tool registries, and remote tool access.

Works in 3 steps: Function decorator (@tool) — fastest for… → Class-based (extend BaseTool) — for… → MCP remote tools — for external services…
The user wants to create tools for agents
SKILL.md covers Tool Architecture, Function Decorator Tools, Class-Based Tools and Tool Registry, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Agenticx Tool Creator is an agent skill from DemonDamon/AgenticX. Guide for creating custom tools in AgenticX including function decorator tools, MCP tool integration, tool registries, and remote tool access. Use when the user wants to create tools for agents, integrate external APIs as tools, build MCP servers, or extend agent capabilities with custom functions.

Its SKILL.md is about 980 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol. The repository describes itself as: AgenticX is a unified, production-ready multi-agent platform — Python SDK + CLI (agx) + Studio server + Machi desktop app. Features Meta-Agent orchestration, 15+ LLM providers… The licence is Apache-2.0.

When your agent uses it

The user wants to create tools for agents
Integrate external APIs as tools
Build MCP servers
Extend agent capabilities with custom functions

Example prompts

“/agenticx-tool-creator”

Requirements

Python 3

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

Function decorator (@tool) — fastest for simple tools
Class-based (extend BaseTool) — for complex or stateful tools
MCP remote tools — for external services via Model Context Protocol

What it can do on your machine

Read from SKILL.md and the folder at commit ce32aff. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are python).
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 no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Agenticx Tool Creator loads about 976 tokens when it runs. Until then it costs about 80 tokens; SKILL.md has 214 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~80
When it runs · the whole SKILL.md, loaded when a task matches: ~976

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from DemonDamon/AgenticX at commit ce32aff, republished under its Apache-2.0 licence (© DemonDamon). 214 words, ~976 tokens.

Download SKILL.mdSave it as .claude/skills/agenticx-tool-creator/SKILL.md (or your agent's skills folder).

name: agenticx-tool-creator
description: Guide for creating custom tools in AgenticX including function decorator tools, MCP tool integration, tool registries, and remote tool access. Use when the user wants to create tools for agents, integrate external APIs as tools, build MCP servers, or extend agent capabilities with custom functions.
metadata.author: AgenticX
metadata.version: 0.6.5

AgenticX Tool Creator

Guide for building tools that extend agent capabilities.

Tool Architecture

AgenticX tools inherit from BaseTool and are consumed by agents during execution. Three approaches exist:

Function decorator (@tool) — fastest for simple tools
Class-based (extend BaseTool) — for complex or stateful tools
MCP remote tools — for external services via Model Context Protocol

Function Decorator Tools

python

from agenticx.tools import tool

@tool
def search_web(query: str) -> str:
    """Search the web for information.

    Args:
        query: The search query string.

    Returns:
        Search results as text.
    """
    # implementation
    return f"Results for: {query}"

@tool
def read_file(path: str) -> str:
    """Read contents of a local file."""
    with open(path) as f:
        return f.read()

The @tool decorator reads the function signature and docstring to generate the tool schema automatically. The docstring is the tool description the LLM sees.

Class-Based Tools

For tools needing initialization, state, or complex logic:

python

from agenticx.core import BaseTool

class DatabaseQuery(BaseTool):
    name = "database_query"
    description = "Query the project database."

    def __init__(self, connection_string: str):
        super().__init__()
        self.conn = connect(connection_string)

    def _run(self, sql: str) -> str:
        return self.conn.execute(sql).fetchall()

Tool Registry

python

from agenticx.core import ToolRegistry

registry = ToolRegistry()
registry.register(search_web)
registry.register(read_file)

# List all registered tools
for t in registry.list_tools():
    print(f"{t.name}: {t.description}")

MCP Integration

AgenticX supports the Model Context Protocol for remote tool access.

Connecting to an MCP Server

python

from agenticx.protocols import MCPClient

client = MCPClient(server_url="http://localhost:3000")
tools = client.list_tools()

# Use MCP tools like local tools
result = client.call_tool("search", {"query": "AI agents"})

Building an MCP Server

AgenticX agents can be exposed as MCP-compatible services:

python

from agenticx.protocols import MCPServer

server = MCPServer(host="0.0.0.0", port=3000)
server.register_tool(search_web)
server.register_tool(read_file)
server.start()

Skill-Based Tools

Skills (SKILL.md bundles) are also exposed as tools via SkillTool:

python

from agenticx.tools.skill_bundle import SkillBundleLoader, SkillTool

loader = SkillBundleLoader()
skill_tool = SkillTool(loader=loader)
# Agents can invoke: skill_tool("list") or skill_tool("read <skill-name>")

Tool Design Guidelines

Clear docstrings — the LLM uses the docstring to decide when to call the tool
Type hints — always annotate parameters and return types
Error handling — return descriptive error messages, don't raise bare exceptions
Minimal scope — one tool, one purpose
Idempotent when possible — safe to retry without side effects
Test independently — verify tools work before attaching to agents

Advanced: Tool Context

Tools can access execution context:

python

@tool
def contextual_tool(query: str, _context: "ToolContext" = None) -> str:
    """A tool that uses execution context."""
    if _context:
        user = _context.user
        session = _context.session_id
    return f"Processed: {query}"

Files

Just SKILL.md in agenticx/skills/agenticx-tool-creator of DemonDamon/AgenticX.

Open the folder on GitHubat commit ce32aff

Compare with similar skills

Agenticx Tool Creator 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.

Agenticx Tool Creator compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Agenticx Tool Creator this skillDemonDamon/AgenticX	315	—	~976	Automated safety check: Pass	Apache-2.0	today
MCP Server Builderanthropics/skills	180k	63 repos	~2.3k	Automated safety check: Pass	Apache-2.0	today
MCP Server BuildershareAI-lab/learn-claude-code	78k	5 repos	~1.2k	Automated safety check: Pass	MIT	11 days ago
MCP Integration for Pluginsanthropics/claude-plugins-official	38k	11 repos	~3.1k	Automated safety check: Pass	Apache-2.0	today
Crush Configurationcharmbracelet/crush	29k	—	~3.7k	Automated safety check: Pass	Custom licence	today
Context Mode Output Sandboxmksglu/context-mode	26k	—	~4.1k	Automated safety check: Pass	Custom licence	today

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Works with

Model Context Protocol

Questions about Agenticx Tool Creator

What does Agenticx Tool Creator do?

Guide for creating custom tools in AgenticX including function decorator tools, MCP tool integration, tool registries, and remote tool access. Agenticx Tool Creator is an agent skill from DemonDamon/AgenticX. Guide for creating custom tools in AgenticX including function decorator tools, MCP tool integration, tool registries, and remote tool access.

When should I use Agenticx Tool Creator?

Agenticx Tool Creator fits situations like: the user wants to create tools for agents; integrate external APIs as tools; build MCP servers; extend agent capabilities with custom functions.

How do I install Agenticx Tool Creator in Claude Code?

Run `npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a claude-code`. Or copy the skill folder (agenticx/skills/agenticx-tool-creator in DemonDamon/AgenticX) into .claude/skills/agenticx-tool-creator in your project. Claude Code loads it when a task matches its description.

How do I install Agenticx Tool Creator in Codex?

Run `npx skills add DemonDamon/AgenticX --skill agenticx-tool-creator -a codex`. Or copy the skill folder (agenticx/skills/agenticx-tool-creator in DemonDamon/AgenticX) into .agents/skills/agenticx-tool-creator in your project. Codex loads it when a task matches its description.

Can I use Agenticx Tool Creator 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 DemonDamon/AgenticX --skill agenticx-tool-creator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/agenticx-tool-creator, .gemini/skills/agenticx-tool-creator, .github/skills/agenticx-tool-creator and .opencode/skills/agenticx-tool-creator in your project.

What does Agenticx Tool Creator need to run?

SKILL.md names no scripts, command-line tools or credentials: Agenticx Tool Creator is instructions for the agent only. Our summary lists: Python 3.

Does Agenticx Tool Creator 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 Agenticx Tool Creator 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. Review the folder before installing.

What licence does Agenticx Tool Creator use?

Agenticx Tool Creator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Agenticx Tool Creator use?

About 976 tokens (SKILL.md is roughly 3.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Agenticx Tool Creator?

Skills that share tags, products or a category with Agenticx Tool Creator: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars) and Crush Configuration (charmbracelet/crush, 29k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Agenticx Tool Creator?

DemonDamon (a GitHub user) maintains it in DemonDamon/AgenticX, which has 315 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 9, 2026.

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

Install Agenticx Tool Creator

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

AgenticX Tool Creator

Tool Architecture

Function Decorator Tools

Class-Based Tools

Tool Registry

MCP Integration

Connecting to an MCP Server

Building an MCP Server

Skill-Based Tools

Tool Design Guidelines

Advanced: Tool Context

Files

Compare with similar skills

Similar skills

More from DemonDamon/AgenticX

Related

Questions about Agenticx Tool Creator