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  1. Methodology
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  5. Machine-Readable Capability Metadata

Machine-Readable Capability Metadata

stable

Category: ai-signals · Methodology v4.5

Does your site declare what it can do in a machine-readable form?

Signal Source

Source
homepage HTML JSON-LD blocks (potentialAction / action / *Action types), manifest, well-known
Kind
http_response

Score Bands

VerdictCondition
Pass2 or more distinct capabilities are declared — JSON-LD potentialAction/action objects whose @type ends in 'Action' (e.g. SearchAction, ReserveAction) or that carry a name/target, de-duplicated by type and name
PartialExactly 1 capability is declared, or the definitions are vague
FailNo capability metadata is detected in any parsed JSON-LD block

Description

What this parameter measures

Does your site declare what it can do in a machine-readable form? That is what this parameter checks. friendly4AI parses every <script type="application/ld+json"> block on the homepage, walks the tree for potentialAction and action nodes, and treats each one as a capability when its @type ends in Action (such as SearchAction, ReserveAction, or OrderAction) or when it carries a name or a target URL template. Each capability is labelled by type and name and de-duplicated before counting.

Why it matters for AI-readiness

An agent reading your page can infer a lot, but a declared SearchAction or ReserveAction removes the guesswork: it states the capability, the entry point, and often the parameters in a standard vocabulary the agent already understands. Schema.org actions are the bridge between "this site probably lets me book something" and "this site exposes a booking action at this URL with these inputs." The more capabilities you declare clearly, the more confidently an AI can drive a task to completion.

How we score it

This is a gradient AI-Specific Signals parameter, and the scanner matches the rubric directly by counting distinct capabilities: two or more pass (100), exactly one scores partial (50), and none fails (0). Detection runs entirely over parsed JSON-LD, so an action only counts when it is valid, machine-readable structured data — prose claims about features earn nothing. Like agent onboarding docs, this parameter sits in the AI-Specific Integration group and is not gated on API detection: it is scored on every site, because capability metadata helps agents whether or not you publish a formal API spec.

How to fix common issues

  • Add JSON-LD potentialAction entries to your structured data — start with a SearchAction and the actions most central to your site.
  • Give each action a clear @type ending in Action, plus a name and a target urlTemplate so the entry point is explicit.
  • Declare at least two distinct capabilities to reach the pass tier; one capability only earns a partial.
  • Validate your structured data at search.google.com/test/rich-results so the JSON-LD parses cleanly.
  • Re-scan after publishing to confirm the capabilities are detected and de-duplicated as expected.

Version History

Introduced
v1
Last changed
v4.4

Key takeaways

  • Signal: homepage HTML JSON-LD blocks (potentialAction / action / *Action types), manifest, well-known
  • Category: AI-Specific Signals
  • Passes when: 2 or more distinct capabilities are declared — JSON-LD potentialAction/action…

Related Parameters

  • Action-Oriented API
  • AI Manifests Coverage
  • OpenAPI / API Discoverability

View full methodology changelog · All parameters · GEO/AEO glossary

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