Your First Annotated Action

This guide walks you through annotating a single button with AXAG semantics in under five minutes.

Scenario

You have a product search button on an e-commerce page. Currently, it looks like this:

Before — unannotated search

<div class="search-container">
  <input type="text" id="searchInput" placeholder="Search products..." />
  <button class="btn-search" onclick="searchProducts()">
    Search
  </button>
</div>

An agent looking at this HTML cannot determine:

• What entity is being searched
• What parameters are required vs optional
• Whether this operation has side effects
• What scope the search operates within

Step 1: Identify the Semantic Dimensions

Before annotating, answer these questions:

Question	Answer
What is the intent?	Search for products
What entity does this operate on?	Product
What type of action is this?	Read (non-mutating)
What parameters are required?	query
What parameters are optional?	category, price_min, price_max
What scope does this operate in?	Catalog (public)
What is the risk level?	None
Is it idempotent?	Yes

Step 2: Add AXAG Annotations

🔬 Proposed Implementation Pattern

The attribute syntax shown below is a Proposed Implementation Pattern.

After — fully annotated product search

<div class="search-container">
  <input
    type="text"
    id="searchInput"
    placeholder="Search products..."
    axag-parameter="query"
    axag-parameter-type="string"
    axag-parameter-required="true"
    axag-parameter-description="Free-text search query for product name, description, or SKU"
  />
  <button
    axag-intent="product.search"
    axag-entity="product"
    axag-action-type="read"
    axag-required-parameters='["query"]'
    axag-optional-parameters='["category","price_min","price_max"]'
    axag-scope="catalog"
    axag-risk-level="none"
    axag-idempotent="true"
    axag-description="Search the product catalog by text query with optional filters"
    class="btn-search"
    onclick="searchProducts()"
  >
    Search
  </button>
</div>

Step 3: Validate Your Annotation

Check your annotation against these rules:

• ✅ axag-intent uses entity.verb format
• ✅ axag-entity identifies the domain object
• ✅ axag-action-type is one of: read, create, mutate, delete, navigate
• ✅ Required parameters are listed
• ✅ Risk level is appropriate for the action type
• ✅ Idempotency is declared for read operations

Step 4: Verify the Semantic Contract

The annotation now declares a contract:

"This button performs a product search (a read operation on the product entity) that requires a query parameter, optionally accepts category, price_min, and price_max, operates within the catalog scope, has no risk, and is idempotent."

An agent reading this contract can:

1. Discover the operation without parsing the DOM
2. Construct valid parameters without guessing
3. Assess safety without inspecting visual indicators
4. Retry safely because idempotency is declared

Common Mistakes

Mistake	Problem	Fix
Missing axag-intent	Agent cannot determine purpose	Always declare intent
Using axag-action-type="mutate" for a search	Misclassifies a read operation	Use read for non-mutating operations
Omitting axag-scope	Agent cannot determine access boundaries	Always declare scope
Setting axag-risk-level="high" for a search	Over-classifying a safe operation	Match risk to actual impact

Next Steps

• First Semantic Manifest — Generate a manifest from your annotation
• First Generated Tool — Produce an MCP tool definition