Think stack, not single product
A lot of discussions around agents become muddy because every new term gets flattened into one category. That makes it harder to see what is actually being built. The cleaner view is that different layers are solving different interoperability problems.
In that framing, WebMCP matters for making website capabilities clearer to browser agents. ADK matters for actually building and operating agents. A2A matters when agents need to coordinate across systems rather than staying isolated in one runtime.
What each layer is trying to do
- WebMCP focuses on structured website interaction.
- ADK focuses on building, debugging, and deploying agent systems.
- A2A focuses on how agents coordinate and communicate across boundaries.
- MCP still matters as the broader interoperability layer for tools, context, and external systems.
Why this matters for product teams
Teams make better decisions when they stop treating every new term as a replacement for the last one. If the website is the core surface, WebMCP is relevant. If the challenge is building the agent itself, ADK becomes more relevant. If the challenge is cross-agent coordination, A2A matters more.
That split helps prevent wasted work and lazy architecture conversations. It is much easier to choose the right layer when the problem is named clearly.
What not to do with this landscape
Do not compress every protocol and toolkit into one grand narrative about intelligent automation. That sounds neat, but it destroys practical judgment. The categories are related, but they are not interchangeable.
The winning approach is usually layered. Use the right tool for the right boundary instead of demanding one label to carry the whole stack.
Keep the map clean
The more these terms are flattened into one idea, the worse the architectural decisions usually become. Preserve the distinction between website interaction, agent construction, and agent-to-agent coordination.