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Write Better AI Agent Tools: 5 Python Patterns LLMs Actually Understand

Your AI agent keeps picking the wrong tool. You tweak the system prompt. You add "IMPORTANT: use search_database, NOT search_web." It helps for a day, then breaks again. The problem is not the model. The problem is your tool definitions. LLMs decide which tool to call based on three things: the tool

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klement Gunndu

📅 Mar 21, 2026·⏱ 21 min read·Dev.to ↗

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https://dev.to/klement_gunndu/write-better-ai-agent-tools-5-python-patterns-llms-actually-understand-4m3

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Write Better AI Agent Tools: 5 Python Patterns LLMs Actually Understand

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