AI Application Basics

You might say

Add an AI assistant to my website that people can chat with.

A product that uses an AI model, an interface, and sometimes tools to help people complete tasksWhen you ask a calendar assistant about tomorrow afternoon, the interface receives the question, the model decides what to look up, a calendar tool reads the real schedule, and the app shows the result. The model does not enter the calendar on its own.

Know first

API JSON

Turn “check my calendar” into a result you can verify

User request Can you check whether I’m free tomorrow afternoon?

What the model, app, and tool each do

The app describes the tool: It supplies the calendar tool’s allowed parameters, permissions, and the current question.

The model requests an action: It returns a structured request to call the right tool; that is not a calendar result yet.

The app returns a real result: It validates the request, queries the calendar, and gives the result back for a response.

You can say this to an AI Agent

Confirm user permission and an available calendar tool, then query tomorrow afternoon before answering. If permission is missing or the call fails, say the schedule cannot be read and do not guess; preserve time, title, and source.

Learn next

1Token→2Context Window→3Tool Calling→4Multimodal AI→

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A calendar assistant says there are two meetings tomorrow afternoon, but the product has no calendar permission and made no calendar call. How should this be fixed?

A. Have the app request permission, call the calendar tool, and give real results to the AI for wordingB. Let the model infer meetings from the user's tone without connecting a real calendarC. Write You must query the calendar in the prompt and treat the response as executed