Tag Archives: Agent Loop

Anatomy of an Agent Loop in Azure Logic Apps

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Part 2 of 7 in the Logic Apps Agent Loop series

Part 1 explained why the Azure Logic Apps agent loop is a different design paradigm from conventional workflow automation. This post gets hands-on with the anatomy of that loop. We will look at the four building blocks that make up every agent loop trigger, instructions, connected model, and tools, and walk through how to wire them together in a Standard logic app.

By the end of this post you will have a working autonomous agent that accepts a prompt from a trigger, reasons over it using Azure OpenAI, invokes a connector action as a tool, and returns a result. The run history will show you exactly how the loop iterated.

The Azure Logic Apps agent loop: four building blocks

Before opening the designer, it helps to have a clear mental model of what you are assembling. Every Azure Logic Apps agent loop consists of four parts.

Trigger

The trigger starts the workflow, exactly as it does in any nonagentic Logic Apps workflow. For an autonomous agent, this can be any supported trigger an HTTP request, a timer, a Service Bus message, a new email, or anything else in the connector library. The trigger’s output becomes the initial input to the agent: the prompt or data the model will reason over.

Instructions

Instructions are the system prompt for the agent. You provide them as a block of natural language text in the agent action’s configuration pane. They define the agent’s role, what it can and cannot do, how it should respond, and any constraints it should observe. A well-written instructions block is the single most important factor in how well the agent performs. Think of it as the job description you hand to the model at the start of every run.

Connected model

The agent needs a language model to reason with. In Standard Logic Apps, you connect the agent to an Azure OpenAI Service resource and specify the model deployment to use — typically a GPT-4o deployment. The agent sends the instructions, the trigger input, and the results of any tool calls to the model at each iteration of the loop. The model’s response tells the agent what to do next.

Tools

A tool is a sequence of one or more connector actions that the agent can choose to invoke. You build tools directly in the Logic Apps designer by adding actions from the connector gallery inside the agent action. Each tool gets a name and a description — the model uses these to decide which tool to call and when. A single agent can have multiple tools. An agent with no tools can still respond to prompts using the model’s built-in knowledge, but it cannot take action on external systems.

The diagram below shows how these four parts fit together inside a single agent loop execution.

Anatomy of an Azure Logic Apps agent loop — trigger, instructions, model, and tools
Figure 1 — Every Azure Logic Apps agent loop consists of four building blocks: a trigger that starts the workflow, instructions that define the agent’s role, a connected model (Azure OpenAI / GPT-4o) that reasons over each iteration, and tools built from connector actions. The loop cycles through Think, Act, and Observe until the model determines the task is complete.

Building your first agent loop in Azure Logic Apps

The demo for this post is deliberately simple: an agent that receives a topic via an HTTP trigger, uses Azure OpenAI to generate a summary, and returns the result to the caller. One trigger, one model, one tool is enough to see all four building blocks in action and to read a meaningful run history.

Prerequisites

  • A Standard logic app resource deployed in Azure
  • An Azure OpenAI Service resource with a GPT-4o model deployment
  • Contributor access to both resources

Step 1: Create the workflow

In the Azure portal, open your Standard logic app and select Workflows from the sidebar. Choose Add, then select Autonomous Agents as the workflow type. Give the workflow a name and select Stateful. Logic Apps creates a new workflow with an empty agent action already in place.

Step 2: Configure the trigger

The autonomous agent workflow template starts with a When a HTTP request is received trigger by default. Leave the method as POST. In the request body JSON schema, add a single property: topic of type string. This is the input the agent will work with.

Step 3: Write the instructions

Select the agent action in the designer to open its configuration pane. On the Parameters tab, find the Instructions field. Enter something like the following:

You are a research assistant. When given a topic, use the available tools to retrieve relevant information and return a concise summary of no more than three sentences. Always cite your source.

Keep instructions specific and bounded. Vague instructions produce unpredictable behaviour. The model will take the instructions literally, so precision matters.

Step 4: Connect the model

Still on the Parameters tab, select Add connection under the model configuration section. Choose Azure OpenAI Service, select your resource, and choose your GPT-4o deployment. Logic Apps establishes the connection and stores it against the workflow.

Step 5: Add a tool

Inside the agent action, select Add a tool. This opens the connector gallery filtered to actions that can be used as tools. For this demo, add the HTTP action as a tool — name it search_web, give it the description “Retrieves content from a given URL”, and configure it to accept a URL as input. In a production scenario you would use Azure AI Search or a more capable connector here; the HTTP action keeps the demo self-contained.

Step 6: Save and run

Save the workflow. Use a REST client to POST a JSON body like {"topic": "Azure Logic Apps agent loop"} to the workflow’s trigger URL. The agent fires, the model reasons over the instructions and the topic, invokes the search tool, and returns a summary.

Logic Apps designer view of an autonomous agent workflow. The canvas shows an HTTP request trigger connected to an Agent action containing a Tool with an HTTP action inside. The right pane shows the Agent parameters: AI model set to GPT-4o via Foundry Models, instructions for the research assistant role, and the topic dynamic value wired as user instructions item 1.
Figure 2 — The completed agent configuration in the Logic Apps designer. The Agent action is connected to GPT-4o via Foundry Models, the instructions define the research assistant role and output format, and the topic value from the HTTP trigger is passed in as the user instruction. The Tool contains a single HTTP action that the agent can invoke to retrieve content from a given URL.

Reading the run history

he run history is where the Azure Logic Apps agent loop becomes visible. Open the workflow’s Run history and select the latest run. You will see the trigger, followed by the agent action. Expand the agent action and you will find each iteration of the loop shown as a numbered step: the model’s reasoning output, the tool call with its inputs and outputs, and the model’s decision on whether to loop again or return a final answer.

This is the key difference from a nonagentic run history. In a conventional workflow, the run history shows a flat list of actions. In an agent loop, it shows a nested, iterative structure the model’s chain of thought made visible.

Run history of a Logic Apps autonomous agent workflow completed in 9.21 seconds, showing the HTTP trigger, a first agent iteration that invoked the HTTP tool in 3.7 seconds, and a second agent iteration that sent the final chat message.
Figure 3 — The run history of the minimal autonomous agent from this post. The loop ran two iterations: the first agent step (3.9s) reasoned over the topic prompt and invoked the HTTP tool (0.6s); the second agent step (3.2s) observed the result and composed the final response. The canvas shows iteration 1 of 3 steps — trigger, tool, and HTTP action — all succeeded in 9.21 seconds total.

For a simple prompt, you may see a single iteration. For a more complex task involving multiple tool calls, you will see the loop unfold across three, five, or more steps. Each step shows exactly what the model decided and why.

Standard versus Consumption: model connections

In Standard logic apps, you configure the model connection yourself — selecting an Azure OpenAI Service resource and specifying the deployment. This gives you full control over which model version you use, where it is hosted, and how it is secured via Managed Identity.

In Consumption logic apps (currently in public preview), the model connection is handled via Microsoft Foundry and the configuration is more constrained. For any production workload, Standard remains the right choice.

What comes next

The agent in this post is autonomous it runs without human interaction, triggered by an HTTP call and returning a result when done. That covers a wide range of integration scenarios, but not all of them. Some tasks require a back-and-forth with a user: a support conversation, a guided data-entry flow, a multi-turn research session.

The next part will cover exactly that distinction, autonomous versus conversational agentic workflows, and walk through when to choose each pattern and what changes in the designer when you do.

Why the Agent Loop Changes Everything in Azure Logic Apps

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Part 1 of 7 in the Logic Apps Agent Loop series

The Azure Logic Apps agent loop introduces a fundamentally different way to design workflows on the platform. While conventional Logic Apps workflows follow a fixed sequence of steps defined at design time, the agent loop delegates reasoning to a large language model at runtime, looping through think, act, and observe cycles until a task is complete. This post opens a seven-part series on building agentic workflows in Logic Apps. It starts with the question that matters most: why does this change anything?

For years, Azure Logic Apps has been the platform of choice for integration architects who need to orchestrate business processes across cloud services and on-premises systems. You build a workflow, wire up triggers and actions, define your conditions, handle your errors, deploy, and move on. The flow is predictable (deterministic): given the same inputs, it does the same thing every time. That predictability is the point.

The agent loop breaks that contract, deliberately and usefully.

With the introduction of agentic workflows in Azure Logic Apps, Microsoft has extended the platform from a fixed automation engine into something that can reason, adapt, and decide. At its core, the agent loop drives this shift. It is a repeating process: the connected language model thinks through a problem, selects a tool, acts on the result, and decides whether the task is done.Unlike a conventional workflow, there is no hardcoded sequence of steps. Instead, the model determines the path based on the task.

This post is the opening of a seven-part series on building agentic workflows in Azure Logic Apps. Before going hands-on with triggers, connectors, and multi-agent patterns in later posts, this one makes the case for why the agent loop matters and what it fundamentally changes about how you think about workflow design.

How the Azure Logic Apps agent loop differs from nonagentic workflows

Nonagentic Logic Apps workflows are excellent at exactly the kind of work they were designed for: stable, predictable, repeatable processes. An approval workflow, an ETL pipeline, and a B2B message exchange are all scenarios where the path through the workflow is known in advance. The trigger fires, the conditions evaluate, the actions execute in sequence, and the run history tells you exactly what happened and why.

The challenge arises when the environment you are integrating with is unstable or unpredictable. When incoming data is unstructured. Or when the right action depends on context that cannot be captured in a condition expression. Or when you need to handle a customer query that could go a dozen different directions depending on what the customer actually says.

These are the cases where deterministic workflows buckle. You end up building sprawling switch-case structures, hardcoding edge cases as branches, and constantly patching the workflow every time a new variation appears. The workflow becomes a maintenance problem rather than a solution.

Agentic workflows excel in dynamic environments where unexpected events occur, the choice of the right tool relies on the input, and the system must manage unstructured data without specific instructions for each variant.

The agent loop: Think, Act, Learn

How the agent loop works: Think, Act, Learn

The Azure Logic Apps agent loop follows a three-step process.

Think. The agent collects available information: task instructions, prior inputs, and previous tool results. It then passes all of this to the connected language model.The model reasons over the context and decides what to do next: invoke a tool, ask a follow-up question, or return a final answer.

Act. In Logic Apps, tools are actions drawn from 400+ connectors. These include Azure OpenAI, Azure AI Search, Office 365, and custom APIs. Once the action runs, the result feeds back into the next cycle.

Optionally, the loop adapts. The agent can use feedback or external signals to adjust its behaviour over time, though this is the most advanced capability and not required for most workflows.

Iterations, not instructions

This loop continues think, act, observe, decide until the model determines the task is complete. You can change the number of iterations as needed. A simple query might resolve in one loop. A complex multi-step task might require five or ten.

The diagram below shows the difference between a conventional non-agentic workflow, which follows a linear sequence of predetermined steps, and the agent loop, which dynamically iterates until the model determines that the task is complete.

Figure 1 — A conventional nonagentic workflow follows a fixed path defined at design time (left). The agent loop iterates dynamically at runtime: the LLM thinks, acts, observes the result, and decides whether to loop again or return a final answer (right).

Agent versus nonagentic: a structural comparison

The difference is not just philosophical. It shows up in how you design, deploy, and maintain the workflow.

In a nonagentic workflow, the logic architect owns the decision tree. Every branch, every condition, every action path is explicitly modelled. This is powerful for known, bounded scenarios, but it places all the reasoning burden on the architect at design time.

In an agentic workflow, the reasoning is delegated to the model at runtime. The architect’s job shifts: instead of modelling every path, you define the agent’s instructions, give it the right tools, and trust the model to navigate the task. This is a different skill and a different mindset closer to prompt engineering and system design than to traditional workflow modelling.

The Microsoft documentation puts it plainly: agentic workflows can adapt to environments where unexpected events happen, choose which tools to use based on prompts and available data, and handle unstructured data at a level of flexibility that nonagentic workflows simply cannot match. Moreover, nonagentic workflows function best in stable environments with static, predictable, repetitive tasks.

Neither is universally better. They address different problems. But for integration architects, the arrival of the agent loop means Logic Apps can now cover territory that previously required a custom-coded application or a fully separate agent framework.

Standard versus Consumption: what you need to know now

Azure Logic Apps offers two hosting models: Standard (single-tenant, runs on Azure Functions runtime) and Consumption (multitenant, pay-per-execution). Agentic workflows are fully available in Standard. Consumption support is in public preview as of early 2026 and carries some restrictions.

For production agentic workloads, Standard is the right choice today. The rest of this series will use Standard throughout, with notes where the Consumption behaviour differs.

What this series covers

The seven posts in this series move from concept to production:

  1. Why the agent loop changes everything — this post
  2. Anatomy of an agent loop — instructions, the connected model, tool calls, and how the loop iterates
  3. Autonomous versus conversational workflows — choosing between unattended execution and human-in-the-loop patterns
  4. Building tools for the agent — connectors, custom connectors, and MCP servers as tool providers
  5. Multi-agent patterns — handoffs, orchestrators, and sequential agent loops
  6. Securing agentic workflows — authentication, the expanded caller surface, and Easy Auth
  7. Observability, pricing, and running in production — Application Insights, agent loop pricing, and DevOps deployment

The next post gets hands-on: we will look at the anatomy of a single agent loop in the Logic Apps designer, walk through the instructions pane, wire up Azure OpenAI as the model, and watch the run history to see how the iterations unfold.

Agentic Orchestration: The Evolution of SOA

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For decades, integration professionals have shaped the digital backbone of enterprises from EAI to SOA to microservices. Today, agentic orchestration marks the next step in that evolution: transforming how we compose, coordinate, and reason across enterprise services. This isn’t a replacement for what we know; it’s an intelligent upgrade to it.

We built the bridges, the highways, and the intricate railway networks of the digital world. Yet, let’s be honest—for all our sophistication, our orchestrations often felt like a meticulous, rigid dance.

Enter Agentic Orchestration. This isn’t just another buzzword. It’s a profound shift, an evolution that takes the core principles of SOA and infuses them with intelligence, dynamism, and a remarkable degree of autonomy. For the seasoned integration architect and engineer, this isn’t about replacing what we know—it’s about enhancing it, elevating it to a new plane of capability.

How SOA Composites Differ from Agentic Orchestration

Cast your mind back to the golden age of SOA. For those of us in the Microsoft ecosystem, this meant nearly two and a half decades with BizTalk Server as our workhorse, our battleground, our canvas. We diligently crafted composite services using orchestration designers, adapters, and pipelines. Others wielded BPEL and ESBs, but the principle was the same. Our logic was clear, explicit, and, crucially, deterministic.

If a business process required validating a customer, then checking inventory, and finally processing an order, we laid out that sequence with unwavering precision—whether in BizTalk’s visual orchestration designer or in BPEL code:

XML

<bpel:sequence name="OrderFulfillmentProcess">
  <bpel:invoke operation="validateCustomer" partnerLink="CustomerService"/>
  <bpel:invoke operation="checkInventory" partnerLink="InventoryService"/>
  <bpel:invoke operation="processPayment" partnerLink="PaymentService"/>
</bpel:sequence>

Those of us who spent years with BizTalk know this dance intimately: the Receive shapes, the Decision shapes, the carefully constructed correlation sets, the Scope shapes wrapped around every potentially fragile operation. We debugged orchestrations at 2 AM, optimized dehydration points, and became masters of the Box-Line-Polygon visual language.

This approach delivered immense value. It brought order to chaos, reused services, and provided a clear, auditable trail. However, its strength was also its weakness: rigidity. Any deviation or unforeseen circumstance required a developer to step in, modify the orchestration, and redeploy. The system couldn’t “think” its way around a problem it merely executed a predefined script a well-choreographed ballet, beautiful but utterly inflexible to improvisation.

Agentic Orchestration: From Fixed Scripts to Intelligent Collaboration

Now, imagine an orchestration that doesn’t just execute a script, but reasons. An orchestration where the “participants” are not passive services waiting for an instruction, but intelligent agents equipped with goals, memory, and a suite of “tools”—which, for us, are often our existing services and APIs.

This is the essence of agentic orchestration. It shifts from a predefined, top-down command structure to a more collaborative, goal-driven paradigm. Instead of meticulously charting every step, we define the desired outcome and empower intelligent agents to find the best path to it.

Think of it as moving from a detailed project plan (SOA) to giving a highly skilled project manager (the Orchestrator Agent) a clear objective and a team of specialists (worker agents, each with specific skills/tools).

Key Differences that Matter

From Fixed Sequence to Dynamic Planning:

Traditional SOA executes a predetermined sequence: Step A, then Step B, then Step C. Agentic orchestration takes a different approach — agents dynamically construct their plan based on current context and available resources, asking: “What tools do I have, and which best serve this step?”

From Explicit Error Handling to Self-Correction:

In SOA, elaborate try-catch blocks covered every potential failure. BizTalk veterans will remember wrapping Scope shapes inside Scope shapes, each carrying its own exception handler. With agentic systems, a failing tool triggers reasoning rather than a halt — the agent may retry with a different tool, consult another agent, or revise its plan entirely.

From API Contracts to Intent-Based Communication:

Traditional SOA services communicate via strict, often verbose XML or JSON contracts — schema design and message transformation consumed countless engineering hours. Agentic systems shift to intent-based communication instead. An “Order Fulfillment Agent” can instruct a “Shipping Agent” with a clear goal: “Ship this package to customer X by date Y.” The Shipping Agent then determines which underlying tools, FedEx API, DHL API, best achieve that outcome, abstracting away the complexity of individual service calls.

From Static Connectors to Smart Tools:

Connectors and adapters in SOA are fixed pathways, each requiring explicit configuration per integration point. BizTalk veterans know this well from hours spent configuring adapters for every specific endpoint. In agentic architectures, existing APIs, databases, message queues, and even legacy systems are reframed as tools that agents can discover and wield intelligently. A Logic App connector to SAP is no longer just a connector; it becomes a capable SAP tool that an agent can invoke when the situation calls for it. The Model Context Protocol (MCP) is making this kind of dynamic tool discovery increasingly seamless.

A Concrete Example

Consider an order that fails the inventory check in our traditional BPEL or BizTalk orchestration. In SOA: hard stop, send error notification, await human intervention, and process redesign.

In an agentic system, the orchestrator agent might dynamically query alternate suppliers, adjust delivery timelines based on customer priority, suggest product substitutions, or even negotiate partial fulfillment—all without hardcoded logic for each scenario. The agent reasons about the business goal (fulfill the customer order) and uses available tools to achieve it, adapting to circumstances we never explicitly programmed for.

Azure Logic Apps: The Bridge to the Agentic Future

Azure Logic Apps demonstrates this evolution in practice, and it’s particularly compelling for integration professionals. For those of us coming from the BizTalk world, Logic Apps already felt familiar—the visual designer, the connectors, the enterprise reliability. Now, we’re not throwing away our decades of experience with these patterns. Instead, we’re adding an “intelligence layer” on top.

The Agent Loop within Logic Apps, with its “Think-Act-Reflect” cycle, transforms our familiar integration canvas into a dynamic decision-making engine. We can build multi-agent patterns—agent “handoffs” in which one agent completes a task and passes it to another, or “evaluator-optimizer” setups in which one agent generates a solution and another critiques and refines it.

All this, while leveraging the robust, enterprise-ready connectors we already depend on. Our existing investments in integration infrastructure don’t become obsolete; they become more powerful. The knowledge we gained from debugging BizTalk orchestrations, understanding message flows, and designing for reliability? All of that remains valuable. Microsoft is simply upgrading our toolkit.

Adopting Agentic Orchestration: The Path Forward for Integration Architects

For integration engineers and architects, this is not a threat but an immense opportunity. We are uniquely positioned to lead this charge. We understand the nuances of enterprise systems, the criticality of data integrity, and the challenges of connecting disparate technologies. Those of us who survived the BizTalk years are battle-tested, we know what real-world integration demands.

Agentic orchestration frees us from the burden of explicit, step-by-step programming for every conceivable scenario. It allows us to design systems that are more resilient, more adaptive, and ultimately, more intelligent. It enables us to build solutions that not only execute business processes but also actively contribute to achieving business outcomes.

Start small: Identify one rigid orchestration in your current architecture that would benefit from adaptive decision-making. Perhaps it’s an order-fulfillment process with too many exception handlers, or a customer-onboarding workflow that breaks when regional requirements change. That’s your first candidate for agentic enhancement.

Let’s cast aside the notion of purely deterministic choreography. Let us instead embrace the era of intelligent collaboration, where our meticulously crafted services become the powerful tools in the hands of autonomous, reasoning agents.

The evolution is here. It’s time to orchestrate a smarter future.