MCP beats CLI for most integrations as models get better at tool calling, say AI engineers
HankYeomans · x · 2026-09-16
A view resonating among AI engineers: MCP is now preferable to exposing CLI commands for most tool integrations.
Key arguments:
- Frontier models have gotten much better at tool calling, making MCP tools work reliably
- MCP supports tool deferral and is now stateless, which simplifies harness design
- When composing or filtering data, add parameters like query to your MCP tools
The author notes their meta harnesses use MCP for all external tools and recommends MCP tools over CLIs for anyone building custom harnesses.
Related event: Developers Converge: MCP Now Beats CLI for Most Agent Integrations(14 posts)→
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