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Module 7 · AI Agents

AI Agents Explained

An AI agent combines a model with goals, tools, state, and a control loop that selects and evaluates actions.

Written and reviewed by Mahendra Akula Knowledge Bytes
Article available nowVideo lesson coming later

This reading lesson is complete and can be studied independently. The video will be added here when it is published.

Core idea

AI Agents Explained

An AI agent combines a model with goals, tools, state, and a control loop that selects and evaluates actions.

Design principle: Define the outcome, use authorized information, constrain the system, and verify real results before relying on them.

Visual workflow

How the parts connect

01Goal→
02Observe→
03Plan→
04Use tool→
05Evaluate→
06Stop

Every boundary is an opportunity to validate inputs, permissions, quality, and failure handling.

Worked example

Apply the concept

A travel agent proposes an itinerary, calls approved search tools, asks before booking, and verifies the reservation response before reporting completion.
RequirementState the user outcome and success measure.
InformationUse representative, authorized, high-quality data.
ControlAdd permissions, validation, review, and recovery.
EvidenceMeasure quality, safety, latency, cost, and value.

Production and responsibility checklist

01

Quality

Correctness, relevance, coverage, and consistency.

02

Security

Identity, data, tools, networks, and logs.

03

Fairness

Impacted groups and meaningful failure differences.

04

Operations

Latency, errors, drift, quotas, and availability.

05

Human control

Review, escalation, override, and accountability.

06

Economics

Usage drivers and measurable business value.

Knowledge check

What to remember

  • Receive goal
  • Plan next action
  • Use tool or knowledge
  • Observe and continue
  • Identify the requirement, constraint, risk, and verification method before choosing a technology.

Key takeaways

  • Receive goal
  • Plan next action
  • Use tool or knowledge
  • Observe and continue

Check your understanding

  1. Can you explain this concept in two sentences without using jargon?
  2. Can you identify the input, process, output, and validation step in the example?
  3. Can you name one suitable use case and one case where another approach is better?
  4. Which risk or limitation should a responsible implementation address?

Research references

Public sources and further reading

This lesson is original educational writing informed by the public references below. Use the sources to explore definitions, technical details, and current AWS exam objectives.