Tools vs. MCP vs. Skills Explained

Are you confused about the difference between AI tools, the Model Context Protocol (MCP), and AI skills? In this video, we break down why these three concepts aren't competing—they are three essential architectural layers designed to work together. We follow Alice, a developer at Acme Corp, to demonstrate how missing any of these layers leads to multi-platform integration headaches and expensive $18,000 security flaws. *🧠 WHAT YOU'LL LEARN:* - Why AI tools act as the "hands" that allow models to produce structured intent and call functions - How Model Context Protocol (MCP) acts as the "USB-C for AI," decoupling tools from specific client implementations - How AI Skills provide the "brain" and recipes to enforce business logic, judgment, and guardrails - Security risks across each layer—from prompt injection and tool poisoning to missing human-in-the-loop controls - How to implement OAuth 2.1 authorization and scoping for secure remote MCP servers *🛠️ RESOURCES & LINKS:* - The Confused Developer Playlist: https://www.youtube.com/playlist?list=PLZ14qQz3cfJJjtFCuzSUzTtvRtMyd8U7l - Full Blog Post: https://auth0.com/blog/what-ai-tools-mcp-servers-and-skills-actually-do/ *⏱️ TIMESTAMPS:* 00:00 - The Social Media Confusion (Tools vs. MCP vs. Skills) 00:38 - Three Layers, Three Different Problems 01:13 - Layer 1: What Are AI Tools? (Meet Alice) 01:57 - How Function Calling & Structured Intent Work 03:18 - The Multi-Platform Integration Problem 04:10 - Layer 2: Model Context Protocol (The USB-C for AI) 05:53 - The $18,000 Refund Failure 06:29 - Layer 3: AI Skills (Adding Guardrails & Business Logic) 08:12 - Security Risks Across Tools, MCP, and Skills 10:06 - Identity, Delegation & Authorization with Auth0 10:32 - Architecture Summary & Final Recap If you enjoy this content and want to learn more about identity, security, and access management, subscribe to our channel! Have a topic you'd like to see covered? Let us know if the comments below 👀 ___________________________________________ 🔵Try Auth0 for free - https://a0.to/auth0 🔵The Auth0 blog - https://a0.to/blog 🔵Ask questions on the Community Forum - https://a0.to/community ___________________________________________ Follow Us on Social 🔵 X / Twitter - https://a0.to/twitter 🔵LinkedIn - https://a0.to/linkedin #AIEngineering #ModelContextProtocol #SoftwareArchitecture #LLM #Auth0