# Build Your First AI Agent with One Tool Call

DevFeed: [Build Your First AI Agent with One Tool Call](<https://devfeed.tech/articles/build-your-first-ai-agent-with-one-tool-call-84168.md>)

Original publisher: [Read original article](<https://towardsdatascience.com/build-your-first-ai-agent-with-one-tool-call/>)

Author: Thomas Reid

Published: 2026-10-09T12:30:00Z

Content type: tutorial

Language: en

Sources: [Towards Data Science](<https://devfeed.tech/sources/towards-data-science.md>)

Topics: [AI Agent](<https://devfeed.tech/topics/ai-agent.md>), [AI Context Management](<https://devfeed.tech/topics/ai-context-management.md>), [Agent Harness](<https://devfeed.tech/topics/agent-harness.md>)

Tags: [agentic-ai](<https://devfeed.tech/tags/agentic-ai.md>), [ai](<https://devfeed.tech/tags/ai.md>), [ai-agent](<https://devfeed.tech/tags/ai-agent.md>), [ai-agents](<https://devfeed.tech/tags/ai-agents.md>), [code](<https://devfeed.tech/tags/code.md>), [data](<https://devfeed.tech/tags/data.md>), [llm](<https://devfeed.tech/tags/llm.md>), [llm-agents](<https://devfeed.tech/tags/llm-agents.md>), [programming](<https://devfeed.tech/tags/programming.md>)

## AI overview

This tutorial builds a simple local AI agent with Python, Ollama, and SQLite. It explains how a model requests a tool, how Python validates and runs the request, and how the result is returned for the model to answer an order question. It also covers tool schemas, failure cases, and debugging, while noting that the application must enforce security checks because system prompts are not a hard boundary.

## Source excerpt

AI Agents for Beginners, Part 1 The post Build Your First AI Agent with One Tool Call appeared first on Towards Data Science.