MCP tools are model-elective. Hooks aren't. That distinction turned out to matter more than I expected.
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An MCP server can expose the perfect tool and the model can simply not call it. Nothing is wrong, nothing errors — the information just doesn't arrive. Hooks are the opposite: the harness runs them, so whatever they return lands in context whether the model asked or not. I got stuck on this while t…
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- 2026-08-30 22:56 · DEV Community — AI
MCP tools are model-elective. Hooks aren't. That distinction turned out to matter more than I expected.