Tool selection
Tool selection is the process of deciding whether a tool is needed and choosing an available tool suited to a task.
Build an AI Agent (From Scratch)
Tool selection is the process by which a language model determines whether a tool is needed and chooses the appropriate available tool.
- How it is used
- Uses tool calling to decide whether a request needs external execution or a direct answer.
- How deep it goes
- Traces selection from schemas through host execution and feedback, stopping short of broader selection algorithms.
- Examples
- Contrasts a South Korea capital question with a calculator call for multiplying 1234 by 5678.
- What you can do after
- Apply it via tool calling to define tools, execute selected functions, and return results through conversation history.
Read how Build an AI Agent (From Scratch) explains tool selection →
The Art of AI Product Development
Tool selection is the process by which an agent chooses an appropriate external tool for a task based on tool descriptions and the current request.
- How it is used
- Guides agents toward appropriate external capabilities while balancing simplicity, robustness, and functional power.
- How deep it goes
- Explains description-driven selection, missed or excessive use, tool-count limits, and write-access risks, without detailing model internals.
- Examples
- Uses PubMed, Yahoo Finance News, and YouTube Search to show domain, input, and output distinctions.
- What you can do after
- Diagnose/debug with it by refining descriptions when agents miss tools or invoke them unnecessarily.
Read how The Art of AI Product Development explains tool selection →
Related concepts
- Retrieverused by · A retriever is a software component that searches or queries an information source and returns items relevant to a query for use by downstream processes.
- semantic similarityuses · Semantic similarity is the degree to which two items or representations correspond in meaning, regardless of differences in wording or form.
- evaluationused by · Evaluation is the systematic assessment of a system, result, or approach against relevant criteria, evidence, or objectives.
- similarity searchuses · Similarity search is a retrieval technique that finds or ranks items by comparing their representations with a query according to a similarity or distance measure.
- AI agentuses · An AI agent is a computational system that uses artificial intelligence to interpret information, select actions, and pursue goals through interaction with an environment.
- tool usageuses · Tool use is an AI system's invocation of external software functions, services, or other capabilities to obtain information or perform actions.
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