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THE AI CHRONICLE FIELD GUIDE

AI agents

AI agents plan, use tools and take actions toward a goal. These guides explain how they work, why they fail, who is accountable when they act, and how to build your first one with sensible limits.

Connected geometric forms representing an agent workflow

Start here

An open book beneath an orange sun

THE ESSENTIAL READ

What are AI agents? How they plan and use tools

How agents choose steps, use tools and where their limits lie.

Read the story

Explore AI agents

13 stories

Abstract agent node connecting memory cards, tools, a checkpoint and a goal along an orange path.
AI agents / Explainer

What are AI agents? How they plan and use tools

How agents choose steps, use tools and where their limits lie.

A broken agent path inspected across context, tools, permissions and evaluation.
AI agents / Analysis

Why AI agents fail, and how to diagnose the failure

Trace a bad answer back through the run before you fix it.

No-code workflow blocks linking a trigger, information, an action and human approval.
AI agents / Tutorial

Build your first AI agent without code

Design one small, supervised agent, step by step.

A fixed workflow and an adaptive agent route leading toward the same goal.
AI agents / Explainer

AI agent vs. AI workflow: how to choose

The real difference is who decides the next step.

A product question retrieving catalog and policy cards before human-approved response.
AI agents / Tutorial

Build an ecommerce product-question agent

A supervised agent that answers shoppers from your own catalogue.

A research agent building claims from verified sources and a source ledger.
AI agents / Tutorial

Build a research agent with source verification

An agent that drafts briefs in which every claim is sourced.

An onboarding journey traced through user signals to a single friction point.
AI agents / Tutorial

Build a SaaS onboarding investigation agent

A read-only agent that finds why new accounts stall.

Approved metrics flowing into a reporting draft and analyst review checkpoint.
AI agents / Tutorial

Build a growth reporting agent

A weekly reporting agent whose every number traces to a query.

Invoices and purchase orders matched while one exception is isolated for review.
AI agents / Tutorial

Build an invoice-exception investigation agent

An agent that investigates failed invoice matches, with people approving.

A polished agent demo stage with retries, failures and interventions hidden backstage.
AI agents / Analysis

What AI agent demos leave out

The questions to ask before you buy or build from a demo.

An ecosystem of agent tools, retrieval blocks and evaluation loops around a framework hub.
AI agents / Company profile

LangChain's role in AI agent development

From open-source library to platform company: what LangChain sells.

A voice-agent stack connecting a caller, model, tools and human handoff.
AI agents / Company profile

Vapi's approach to voice agents

How Vapi wires AI phone agents together, and charges for them.

An audit board comparing agent platforms across permissions, approvals and logging.
AI agents / Original research

What AI agent platforms disclose about permissions

Ten agent platforms' permission documentation, read against ten criteria.

A wider perspective