Agent Tool Builder FAQs

Question 1

What is the benefit of using MCP (Model Context Protocol)?

Accepted Answer

MCP is an open standard that allows you to build a tool once and use it across various LLM providers and platforms, ensuring universal compatibility and better observability.

Question 2

How many tools should I provide to an agent at once?

Accepted Answer

It is recommended to stay under 20 tools. Providing too many tools can cause model confusion, increase token costs, and degrade the accuracy of tool selection.

Question 3

Why should tools return strings instead of complex objects?

Accepted Answer

LLMs are optimized for processing text. Returning serialized strings or clear text summaries ensures the model can immediately incorporate the result into its next reasoning step without parsing errors.

Question 4

What is the most important part of building an AI tool?

Accepted Answer

The description is the most critical element. Since the LLM never sees your source code, it relies entirely on the tool's schema and description to understand when and how to execute it.

Question 5

How should I handle tool errors in an agentic workflow?

Accepted Answer

Never allow a tool to fail silently. Return informative errors with 'is_error: true' and include suggestions or corrective actions to help the LLM recover and try again.

Agent Tool Builder

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