I changed a tool's schema four ways and watched three agent frameworks break differently — 36 runs measured

Automated excerpt

"I need to change this tool's arguments — will the agent survive? " Tool schema changes are a daily event in agent development. To answer it, I split schema changes into four harshness levels and re-ran the measurement across 36 runs. Same task, same model across all runs, same recording proxy: 3 frameworks × 4 levels × 3 runs = 36 runs.

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