https://gemini.google.com/

Forms with toolname/tooldescription attributes

document.modelContext.registerTool() on the current path; navigator.modelContext is historical

Input fields with name, type, required, pattern attributes

JSON-LD or microdata structured data presence

/llms.txt or /llms-full.txt file availability

Descriptive meta description tag

OG title, description, type, url tags

robots.txt allows AI bot crawlers

Site served over HTTPS

CSP does not block scripts; unsafe-inline is not required

No HTTP resources on HTTPS page

Descriptive verb-based tool names

Clear, actionable tool descriptions

Complete inputSchema with types and descriptions

Boolean readOnlyHint, untrustedContentHint, consequentialHint, or debugging