MCP vs A2A Explained: AI Agent Communication Protocols & Security Risks
AI Security Podcast18 Huhti 2025

MCP vs A2A Explained: AI Agent Communication Protocols & Security Risks

Dive deep into the world of AI agent communication with this episode. Join hosts Caleb Sima and Ashish Rajan as they break down the crucial protocols enabling AI agents to interact and perform tasks: Model Context Protocol (MCP) and Agent-to-Agent (A2A).

Discover what MCP and A2A are, why they're essential for unlocking AI's potential beyond simple chatbots, and how they allow AI to gain "hands and feet" to interact with systems like your desktop, browsers, or enterprise tools like Jira. The hosts explore practical use cases, the underlying technical architecture involving clients and servers, and the significant security implications, including remote execution risks, authentication challenges, and the need for robust authorization and privilege management.

The discussion also covers Google's entry with the A2A protocol, comparing and contrasting it with Anthropic's MCP, and debating whether they are complementary or competing standards. Learn about the potential "AI-ification" of services, the likely emergence of MCP firewalls, and predictions for the future of AI interaction, such as AI DNS.

If you're working with AI, managing cybersecurity in the age of AI, or simply curious about how AI agents communicate and the associated security considerations, this episode provides critical insights and context.


Questions asked:

(00:00) Introduction: AI Agents & Communication Protocols

(02:06) What is MCP (Model Context Protocol)? Defining AI Agent Communication

(05:54) MCP & Agentic Workflows: Enabling AI Actions & Use Cases

(09:14) Why MCP Matters: Use Cases & The Need for AI Integration

(14:27) MCP Security Risks: Remote Execution, Authentication & Vulnerabilities

(19:01) Google's A2A vs Anthropic's MCP: Protocol Comparison & Debate

(31:37) Future-Proofing Security: MCP & A2A Impact on Security Roadmaps

(38:00) - MCP vs A2A: Predicting the Dominant AI Protocol

(44:36) - The Future of AI Communication: MCP Firewalls, AI DNS & Beyond

(47:45) - Real-World MCP/A2A: Adoption Hurdles & Practical Examples

Jaksot(51)

The Zero-Click AI Hack: How to Contain the Blast Radius of Autonomous Agents

The Zero-Click AI Hack: How to Contain the Blast Radius of Autonomous Agents

Is an AI agent's identity a workload or an action? Ashish spoke to Elie Bursztein, Distinguished Research Scientist and co-author of Google SAIF (Secure AI Framework) about how it is neither and that ...

29 Huhti 47min

Buy vs. Build AI Security: Why [Box.com](http://Box.com) CISO is Creating their Own Agentic SOC

Buy vs. Build AI Security: Why [Box.com](http://Box.com) CISO is Creating their Own Agentic SOC

If your AI solution is just helping humans process the same amount of alerts a little faster, you haven't transformed anything, you've just created a faster hamster wheel.In this episode, Ashish and C...

22 Huhti 46min

Anthropic's Project Mythos: Why the "Zero-Day Machine" is Terrifying the Security Industry

Anthropic's Project Mythos: Why the "Zero-Day Machine" is Terrifying the Security Industry

In this episode, Ashish and Caleb discuss the internet-breaking preview of Project Mythos, an unreleased AI model from Anthropic that has shown an unprecedented, terrifying ability to reason through c...

18 Huhti 1h 3min

Are AI Security Startups Faking It? How to Separate Signal from Noise

Are AI Security Startups Faking It? How to Separate Signal from Noise

With over 70 startups claiming to have built the perfect "AI SOC Analyst" or "AI Threat Hunter," how do you separate the real products from the vaporware? Recorded live at Decibel RSAC Founder Festiva...

15 Huhti 47min

How Lovable Manages 100+ Daily Changes, Vibe Coding & Shadow AI

How Lovable Manages 100+ Daily Changes, Vibe Coding & Shadow AI

What does it actually look like to run security inside one of Europe's fastest-growing AI companies? In this episode, recorded live at the Munich Cybersecurity Conference (MCSC), Ashish Rajan sat down...

2 Huhti 57min

Questions Every CISO Must Ask AI Security Vendors

Questions Every CISO Must Ask AI Security Vendors

RSA Conference 2026 is here and the AI agent hype machine is louder than ever. In this episode, Ashish and Caleb cut through the noise and arm CISOs, practitioners, and security teams with a clear-eye...

18 Maalis 50min

Will Foundation Models Kill Security Startups?

Will Foundation Models Kill Security Startups?

Did Anthropic just kill the AppSec industry? Following the announcement of Claude Code Security, a tool that finds, reasons about, and fixes code vulnerabilities, major security stocks dropped by 8% ....

5 Maalis 59min

How to Build Your Own AI Chief of Staff with Claude Code

How to Build Your Own AI Chief of Staff with Claude Code

What if you could automate your entire work life with a personal AI Chief of Staff? In this episode, Caleb Sima reveals "Pepper," his custom-built AI agent to Ashish that manages emails, schedules mee...

11 Helmi 47min