No useful agent discovery Link headers were found.

Link headers let automated clients discover API catalogs, documentation, and machine-readable alternates without parsing page markup first.

No sitemap candidate returned a successful HTTP response.

Sitemaps help crawlers and agents discover canonical URLs, update timestamps, and deeper content that may not be obvious from homepage navigation alone.

No MCP server card was found at current, transitional, or linked discovery paths.

MCP server cards give agents a stable, public pre-connection discovery surface for server identity, remote transports, protocol compatibility, and safe routing without guessing endpoints.

No WebMCP surface was found to probe.

WebMCP gives agents structured page and browser tool hints so they can understand actions without relying only on screen scraping.

robots.txt was found but did not contain a valid, parseable User-agent group.

robots.txt gives crawlers and agents a standard place to read crawl permissions, disallowed paths, and sitemap locations before requesting site content.

No explicit User-agent rules were found for major AI crawler tokens.

AI crawler product tokens have different meanings. Explicit robots.txt groups make training, search, and retrieval access policy auditable for compliant crawler operators.

The site appears to support login, signup, account access, or credentials but does not publish /auth.md.

Human login and signup flows are often opaque to agents. Auth.md gives automated clients a stable registration contract instead of forcing them to scrape docs, automate browser forms, or guess credential flows.

Generic authentication signals were found, but no OAuth/OIDC discovery signal was detected.

OAuth and OIDC discovery let agents and API clients find authorization, token, and key endpoints programmatically instead of scraping login pages or guessing provider setup.

Generic authentication signals were found, but no OAuth Protected Resource metadata signal was detected.

Protected-resource metadata tells agents which API/resource is locked, which authorization servers can issue tokens for it, and how a 401 challenge maps back to the correct resource.

Applicable HTML response is missing an enforcing Content-Security-Policy header.

Content Security Policy reduces the impact of injection bugs by limiting where scripts, styles, frames, forms, and other browser resources can load or execute.

Content freshness signals are incomplete: missing any valid freshness date in Last-Modified, Schema.org, Open Graph, Dublin Core, generic meta, or sitemap lastmod.

Freshness signals help agents, crawlers, and search systems decide whether content is current enough to cite, summarize, cache, or compare against newer sources.

/llms.txt was not found or could not be fetched.

llms.txt is an emerging Markdown convention for giving language-model clients curated context and links before they crawl broadly. Broken, private, or low-signal links make the file much less useful even when it exists.

No Organization or Organization subtype was found in Schema.org structured data. No WebSite entity was found in Schema.org structured data. Missing identity field(s): Organization.name, Organization.url, WebSite.name, WebSite.url. WebSite.publisher is missing. Organization schema is missing logo and sameAs or public contact evidence.

Organization and WebSite schema help agents identify the publisher, canonical site identity, logo, and related profiles for attribution.

No JSON-LD, Microdata, or RDFa structured data was found.

Structured data gives agents explicit entities, relationships, and page meaning that are harder to infer reliably from visual layout alone.

Best candidate returned Content-Type "text/html; charset=utf-8" instead of text/markdown.

Markdown representations give agents a cleaner page form while preserving normal HTML for browsers and cache-safe representation handling.

HTTPS response is missing Strict-Transport-Security.

HSTS tells browsers to keep using HTTPS after the first secure visit, reducing downgrade, SSL-stripping, and mixed-transport risk for repeat users.

No A2A Agent Card was found at the current, legacy, or fallback discovery paths.

A2A Agent Cards provide protocol-specific discovery for agent identity, skills, input and output modes, transport bindings, capabilities, and security requirements. Legacy A2A also used /.well-known/agent.json, so scanners must classify the card shape before reporting readiness.

No Agent Skills discovery index was found at the canonical or legacy path.

An Agent Skills index lets agents discover task-specific instructions through a small trusted index, then verify and load only the skill artifacts they need.

No Wildcard-style agents.json file was found.

Wildcard agents.json gives agents workflow-level context beyond plain OpenAPI, including flows, links, examples, and API action structure. It is an emerging OpenAPI-adjacent proposal, so scanners should validate the contract shape without treating it as an A2A or IETF standard.

No Content-Usage or Content-Signal declarations were found.

Content usage preference signals communicate intended downstream AI use separately from robots.txt crawl permission. They can express training and search preferences for compliant systems without replacing access-control rules.

No DNS-AID HTTPS/SVCB records were found under _agents.

DNS-AID lets agents discover index, A2A, and other agent entrypoints before fetching HTTP metadata. HTTPS/SVCB records provide the service-binding substrate, while DNSSEC can authenticate the discovery answer when available.

No RSL declarations were found.

Really Simple Licensing is an emerging rights-expression layer for communicating content usage and licensing terms separately from robots.txt crawl permission.

No TDMRep declaration was found at /.well-known/tdmrep.json.

TDMRep is a W3C Community Group protocol and IANA-registered well-known URI for declaring text and data mining reservation policy on applicable content.

Missing answer evidence or trust signals: author, publisher, freshnessDate, sameAs.

Answer engines need visible answer passages, clear question and heading structure, entity definitions, evidence, and trust signals. These signals improve extraction and attribution, but they do not guarantee answer-engine citations or search features.

No evidence-backed, citation-length explanatory paragraph was found.

Generative answer systems work best with visible, self-contained, evidence-backed content, clear entities, trustworthy attribution, structured page sections, and crawler-accessible HTML. These signals improve machine understanding even though they do not guarantee AI citations.

4 section(s) bury or omit a concise opening answer.

Answer engines need visible answer passages, clear question and heading structure, entity definitions, evidence, and trust signals. These signals improve extraction and attribution, but they do not guarantee answer-engine citations or search features.

No named author or publisher identity could be extracted.

Author attribution helps agents cite content responsibly, assess source credibility, and distinguish editorial pages from anonymous marketing copy.

Missing AIO trust signals: author, publisher, freshnessDate.

Google AI Overviews and AI Mode depend on normal Google Search eligibility, snippet permissions, useful visible content, consistent structured data, trust signals, and page experience basics. These signals help Google understand and preview a page, but they do not guarantee selection.

Frame protection relies only on X-Frame-Options; CSP frame-ancestors is the modern control.

Frame protection blocks hostile sites from embedding pages in deceptive frames, reducing clickjacking and UI redressing risk.

Missing source or trust signals: authorOrOwner, freshnessDate, entityLinks.

Generative answer systems work best with visible, self-contained, evidence-backed content, clear entities, trustworthy attribution, structured page sections, and crawler-accessible HTML. These signals improve machine understanding even though they do not guarantee AI citations.

Missing or weak extraction signals: summary or key takeaways, FAQ or question-answer section where appropriate, typed JSON-LD structured data.

Generative answer systems work best with visible, self-contained, evidence-backed content, clear entities, trustworthy attribution, structured page sections, and crawler-accessible HTML. These signals improve machine understanding even though they do not guarantee AI citations.

No JSON-LD structured data was detected for a page type that likely has a useful Google Search schema fit.

Google AI Overviews and AI Mode depend on normal Google Search eligibility, snippet permissions, useful visible content, consistent structured data, trust signals, and page experience basics. These signals help Google understand and preview a page, but they do not guarantee selection.

One or more same-origin active resources observed by Chrome did not emit X-Content-Type-Options: nosniff.

X-Content-Type-Options tells browsers to trust declared media types instead of sniffing content, reducing the risk that mislabeled files execute as active content.

Canonical tag is missing.

Google AI Overviews and AI Mode depend on normal Google Search eligibility, snippet permissions, useful visible content, consistent structured data, trust signals, and page experience basics. These signals help Google understand and preview a page, but they do not guarantee selection.

Semantic HTML is missing or incomplete.

Semantic HTML gives browsers, assistive technology, search systems, and agents reliable landmarks, headings, controls, form semantics, and image context.

Title/H1 terms missing from description: automated, pull, requests.

Generative answer systems work best with visible, self-contained, evidence-backed content, clear entities, trustworthy attribution, structured page sections, and crawler-accessible HTML. These signals improve machine understanding even though they do not guarantee AI citations.