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Tool Calling Is Not an API Call: What Engineers Keep Getting Wrong
Artificial Intelligence  Latest  Machine Learning

Tool Calling Is Not an API Call: What Engineers Keep Getting Wrong

Siddardha Vangala
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June 24, 2026

Author(s): Siddardha Vangala Originally published on Towards AI. Tool Calling Is Not an API Call: What Engineers Keep Getting Wrong Every team that builds an LLM agent eventually hits the same wall. The model calls a tool. Something breaks. Nobody knows why. …

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