MCP Is Not Good Yet — David Cramer, Sentry
Source: YouTube · AI Engineer · published Jul 3, 2025 · 16:39
MCP is a plug-in architecture for agents, not just an API layer, enabling context-rich, agent-driven workflows—especially in enterprise settings 1:09.
Key Takeaways:
• MCP is a pluggable architecture for agents, requiring systemic design around context and agent behavior, not just API exposure 1:57.
• Structured, human-readable outputs like Markdown improve agent reasoning over raw JSON, which is harder for models to interpret 10:08.
• OAuth2.0 integration is critical for B2B SAS companies but complex; Cloudflare Workers simplify implementation via proxying 5:21.
• Agents reason with context, so tool design must prioritize usability, error handling, and cost efficiency 12:47.
• The future of B2B lies in exposing agent capabilities via MCP, offering full control over prompts, costs, and workflows 13:54.
MCP is accessible and practical despite early roughness—focus on agent design and context, not just tool exposure.
Sources:
- 1:09 Introduces MCP as a plug-in architecture for agents, not just an API.
- 1:57 Explains that MCP requires system-level design, not just API exposure.
- 5:21 Details OAuth2.0 challenges and Cloudflare Workers as a solution.
- 10:08 Argues for Markdown over JSON to improve human and model reasoning.
- 12:47 Emphasizes context, error handling, and cost efficiency in agent tool design.
- [13:54](https://www.youtube.com/watch?v=FCi4jT
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[Music] Um, welcome everybody. This is a little bit last minute, so bear with me. If you don't know me, uh, I started Century a long time ago. David Kramer. I'm sort of an engineer, sort of an executive, sort of a founder. Uh, I would like to think I have rational opinions. So that's what this is going to complicated. It's just big scary words. So if you do, great. If you don't, maybe you walk away, you're like, "Yeah, I thought that's what it was. We've done it." Mostly, uh, I was asked a couple days ago while I snuck my way into this conference if I could fill a slot. And so filling this slot was like, "Oh, come give some hot takes. Maybe spice it up a little bit." So that's what we're going to do. It's not going to be too much of a rant. If you know me, I like to rant, but you know, we'…