Why the tools were created
Diagnostic websites often return numbers that look authoritative but come from nowhere visible. YourAnalystAI was created around a different rule: every result must come from a real measurement with a labeled source.
Measurements are made by your browser, by a clearly identified public API, or by the server you are testing — and the page tells you which one. When a measurement is genuinely impossible from a browser (for example the live TLS version of another site, or that site's Core Web Vitals), the tool says “Not available in this test” instead of inventing a value.