What is an AI Agent?

April 21, 2025

Why the “Agent” Definition Matters—and What It Means for Business

At AgenAI, we believe that when people are given wonderful tools, they do wonderful things. Nowhere is this truer than in the world of AI, where the lines between simple “tools” and more advanced “agents” continue to blur. As companies race to integrate AI into their operations, a core question has emerged: what is an AI agent? There is no single, universally accepted definition. Yet, understanding what makes an AI agent distinct is crucial for businesses seeking to automate, innovate, and lead.

In this article, we’ll explore the concept of AI agents—how they differ from AI tools, why the distinction matters, and how emerging best practices are shaping their adoption in real-world enterprise environments. Drawing on insights from frontier companies and our own implementation expertise, we’ll also share key lessons for organizations embarking on their AI journey.

The State of Definitions: Why “Agent” Remains Elusive

The rapid pace of AI advancement has seen everything from chatbots to complex autonomous systems labeled as “agents.” However, as we’ve observed working closely with clients across industries, there’s a growing consensus: not all AI-powered systems are created equal.

Some see agents as software that simulates human tasks—anything from customer support chatbots to process automation bots.
Others reserve the term for systems that operate autonomously, maintain context, adapt over time, and even make decisions independently.

The reality? There is no universally agreed-upon definition—in academia, industry, or practice. This ambiguity can cause confusion for executives evaluating vendors and for teams tasked with deployment. At AgenAI, we advocate for clarity, not just for semantics but because your business case depends on it.

Our Perspective: AgenAI’s Working Definition

Given the lack of consensus, we have established our own precise definition to guide our solutions and help clients make informed choices:

AI agents are dynamic systems that maintain context, handle complex, multi-step workflows, and operate with varying degrees of independence. They exist as persistent entities that can engage in ongoing interactions and execute processes without requiring constant human direction.

The core distinction: AI tools are “used,” but AI agents can “act.”

The Spectrum: Types of AI Agents

Based on implementation experience and evolving capabilities, we categorize AI agents into three broad types:

1. Interactive Agents

Example: A financial advisor chatbot that tracks client preferences over repeated conversations and makes personalized recommendations.

2. Semi-Autonomous Agents

Example: A data analysis assistant that independently processes spreadsheets, surfaces trends, generates reports, but checks with a user for final decisions or interpretation.

3. Autonomous Agents

Example: A voice-enabled agent that fully handles real-time customer returns, verifications, or sales inquiries—automatically, start to finish.

This structured approach reflects how practical enterprises deploy AI today, where “agentic” capabilities align directly with automation needs and process complexity.

Why the Distinction Matters for Business

At a practical level, understanding the “agent” vs. “tool” continuum is fundamental for several reasons:

Scope of Automation
- Towers Watson estimates that up to 60% of back-office work could eventually be automated by advanced AI agents, far more than what’s possible with static tools.
- As shown in "AI in the Enterprise," an AI agent such as Operator automates software QA, data entry, and system updates—tasks previously reliant on human effort, now handled start-to-finish without building custom integrations.
Human Productivity and Value Creation
- Morgan Stanley’s deployment of agent-powered systems resulted in access to documents jumping from 20% to 80%, with advisors spending more time with clients and reducing follow-up time from days to hours. Notably, 98% of advisors reported daily use and overwhelming satisfaction—demonstrating how agents free teams to focus on relationship-building rather than routine hunting and retrieval.
Compounding Organizational Benefits
- Klarna’s customer service AI agent now handles two-thirds of all chats, cuts resolution time from 11 to 2 minutes, and is projected to drive $40 million in profit—while maintaining customer satisfaction at human-equivalent levels. Critically, 90% of Klarna’s employees now use AI daily, showing how widespread agent adoption compounds enterprise returns.
End-to-End Automation
- By embedding agents into workflows—rather than siloed tools—companies gain fully automated processes and improved accuracy, responsiveness, and efficiency. Hundreds of thousands of routine tasks are managed each month, unlocking higher-impact work for teams.

Real-World Examples: Agents in Action

Operator: The Agentic Approach in Practice

OpenAI’s Operator exemplifies the “agent” vision realized at scale. It leverages a virtual browser to:

Navigate the web, interact with apps, fill forms, and gather data just like a human user.
Operate across tools and systems—without needing APIs or custom integrations.
Automate not just simple requests, but end-to-end business processes:
- Conducting software QA by interacting with front-end applications
- Updating records on behalf of users
- Performing data validation or system updates autonomously

This type of system is what we at AgenAI see as the hallmark of agentic innovation—persistent, context-aware, and adaptive to varied enterprise tasks.

Deep Research Agents

Modern AI agents can now independently synthesize hundreds of online sources to produce comprehensive, expert-level reports, cutting research time from hours to minutes. At BBVA, internal evaluations showed an average time saving of 4 hours per complex research task while delivering richer, more actionable insights.

Implementation: Building, Integrating, and Refining AI Agents

Deploying agents isn’t just about plugging in a pre-trained system. At AgenAI, our four-stage process aligns with lessons highlighted in leading enterprise case studies:

1. Assessment:
We begin by analyzing your existing processes to identify where AI agents can drive the most business value—from streamlining financial operations (FP&A), to automating repetitive data work, to enhancing knowledge discovery through contextual document Q&A.

2. Strategy:
Then, we tailor a deployment plan to your goals, considering readiness, technical fit, and return on investment. As illustrated in “AI in the Enterprise”, successful companies start with an open, experimental mindset—evaluating use cases systematically, but focusing on high-impact, low-friction wins.

3. Implementation:
We engineer and integrate your chosen agent, drawing on the latest models (from GPT-4.1 to Gemini 2.5 Pro and beyond). Continuous testing and iterative refinement ensure evolving business needs and employee feedback are built in—a core lesson from agents deployed at Morgan Stanley and Klarna.

4. Optimization:
Finally, we monitor and optimize agent performance in the wild, adjusting for accuracy, reliability, and compliance. As needs shift or new models become available, our clients remain on the cutting edge—never lagging behind the state of the art.

From “Tool” to “Agent”: Business Metrics and Value

Based on our consulting work and case study analysis, enterprises adopting agentic systems see measurable business impacts:

Process Speed: Customer support resolution times reduced from 11 minutes to 2 (Klarna), and research time for complex tasks cut by 4+ hours per case (BBVA).
Employee Engagement: 90%+ daily internal usage at frontier enterprises, signaling rapid internalization and acceptance of AI agents.
Operational Efficiency: Access to key records jumping from 20% to 80% enterprise-wide (Morgan Stanley).
Financial ROI: Direct profit improvements valued at tens of millions, as agents compound return across multiple departments (Klarna).
Scalability: Automation of hundreds of thousands of monthly tasks with minimal IT lift, freeing teams for higher-impact work.

These outcomes are not theoretical—they demonstrate what is possible when companies move beyond siloed tools, toward integrated agentic platforms purpose-built for enterprise scale.

Lessons for the Enterprise: Maximizing Agent Value

Practical insights gleaned from leading deployments reflect the seven key lessons, as detailed in the "AI in the Enterprise" research:

Start with Evaluation: Systematically measure agent performance against real use cases.
Invest Early: Early movers compound value—Klarna’s adoption curve demonstrates exponential return.
Tune for Your Needs: Fine-tune and customize agents for the specifics of your workflow.
Empower Domain Experts: Put agents in the hands of those closest to the work for best results.
Unblock Developers: Automate the software development lifecycle to speed enterprise innovation.
Set Bold Automation Goals: Don’t accept “business as usual”—aim for ambitious, end-to-end process automation.
Iterate and Learn: Remain open, experimental, and adaptive—AI is a new paradigm, not just another software stack.

Conclusion: The Future is Agentic—and It’s Here Now

No matter the exact definition, the trajectory is clear: enterprise value is increasingly delivered by AI agents, not static tools. At AgenAI, we see agents not as a theoretical construct, but as the foundation for the next generation of business transformation.

Ready to start? Whether you have a vision for agentic automation, or want to explore where agents could unlock hidden value in your organization, our experts are here to guide your journey. Reach out to AgenAI and discover what’s possible when the best tools—and the most dynamic agents—are put in your hands.