---
title: "Build a Tool"
description: "Learn the fundamentals of building tools with Arcade&#x27;s MCP Server framework"
---
Create toolsBuild a toolOverview

# Build a Tool

Learn how to create custom tools that extend AI agents with powerful capabilities. Start here when you’re ready to build your first tool or need to add new functionality to your existing  servers.

Building tools with Arcade allows you to extend AI agents with custom capabilities. This section covers everything you need to know about creating powerful, reusable tools using the Model Context Protocol ().

-   [Compare MCP server types](/guides/create-tools/tool-basics/compare-server-types.md)

-   [Build an MCP Server to write custom tools](/guides/create-tools/tool-basics/build-mcp-server.md)

-   [Create a tool with auth](/guides/create-tools/tool-basics/create-tool-auth.md)

-   [Create a tool with secrets](/guides/create-tools/tool-basics/create-tool-secrets.md)

-   [Access runtime data](/guides/create-tools/tool-basics/runtime-data-access.md)

-   [Call tools from MCP clients](/guides/create-tools/tool-basics/call-tools-mcp.md)

-   [Organize your MCP server and tools](/guides/create-tools/tool-basics/organize-mcp-tools.md)


Last updated on January 30, 2026

[Get formatted tool definitions](/en/guides/tool-calling/custom-apps/get-tool-definitions.md)
[Compare MCP server types](/en/guides/create-tools/tool-basics/compare-server-types.md)
