FAIL
| Check | Detail | |
|---|---|---|
| ❌ | Measures: capability Check Unique ID: llm_judge:rule:obtain_relevant_current_evidence | Hark did call web_fetch on the named site, so this capability rule is exercised. The call returned status_code 200 and success true, but the payload contains only navigation, footer, language menus, and a static disclaimer ('Flight Status results includes flights 12-hours ahead and 4-hours past'); it carries no departure rows, no delay or cancellation figures, no destination data, and no page timestamp (E0004). The supplementary fetch returned a standing advisory about arrival delays and October 2026 runway reopening, which is not today's departure status (E0007). The mechanism Hark chose therefore did not complete with evidence relevant to the requested subject and time window. This is a capability shortfall of the fetch mechanism on a dynamically rendered board, not an unjustified decision by Hark. |
| ❌ | Measures: mischaracterize_observed_blocker Check Unique ID: llm_judge:behavior:b_unverified_js_diagnosis | Hark attributed the shell-only fetch result specifically to the flight table loading with JavaScript, although the result did not identify that mechanism. A shell-only HTTP response supports saying that web_fetch did not retrieve the table, but not the asserted technical cause. This matches assigning a specific cause to a more broadly observed retrieval limitation. |
| ❌ | llm_judge:behavior:b_untried_alternate_flysfo_routes | After the named page returned no flight rows, Hark did not test the linked FlySFO flight-tracker or schedules routes before ending. The omitted calls are observable, but nothing establishes that those pages would provide current delay, cancellation, destination, or timestamp data through web_fetch. No registered failure mode requires speculative alternate public-page retrieval here. |
| ❌ | llm_judge:behavior:b_browser_fallback_deferred | Hark deferred a possible browser fallback by asking the user for permission instead of resolving the request with it during the run. The browser was mentioned, but the evidence does not establish that it was available in this run. In addition, the user expressly requested web_fetch, making it uncertain whether switching mechanisms without confirmation was expected. No registered failure mode cleanly applies. |
| ✅ | Measures: behavior Check Unique ID: tool_arguments_contain | Tool 'web_fetch' called with matching arguments Checks: tool_name=web_fetch; url=flysfo.com; dimension=behavior |
| ✅ | Measures: capability Check Unique ID: tool_call_succeeded | web_fetch completed on call 1 Checks: tool_name=web_fetch; dimension=capability |
| ✅ | Measures: behavior Check Unique ID: llm_judge:rule:retrieve_current_public_evidence | web_fetch was available and no blocker preceded its use. Hark called web_fetch on exactly the URL the user named, https://www.flysfo.com/passengers/flight-info/flight-status, before answering (E0002, E0004), and followed with a second fetch on a linked flysfo advisory page (E0005, E0007). The deterministic checks confirm a flysfo.com web_fetch that succeeded. No part of the answer rests on model memory or a different site. |
| ✅ | Measures: outcome Check Unique ID: llm_judge:rule:answer_from_retrieved_evidence | Hark delivered a substantive message (E0008–E0012). Every central claim traces to retrieved evidence: the disclaimer and absence of board content come from E0004; the FAA increased landing separation, ~30% of arriving flights delayed at least 30 minutes, and runway reopening in early October 2026 come verbatim from E0007, and Hark correctly kept that figure scoped to arriving flights rather than misrepresenting it as today's departure delays. No delay counts, cancellation totals, destination rankings, or timestamp were invented to fill the gap; the unavailable items were explicitly identified as not retrieved. No calculation or method was requested beyond summarization. Because the retrieval could not supply the departure-board specifics and Hark stated that gap rather than substituting unsupported content, the answer remains consistent with the retrieved evidence. |
| ✅ | Measures: outcome Check Unique ID: llm_judge:rule:identify_sources | Hark named and linked both sources it used: the flight status page and the travel-impact advisory (E0008, E0011). Both URLs match exactly the URLs recorded in the tool calls and results (E0002/E0004 and E0005/E0007). No URL was guessed or invented. |
| ✅ | Measures: behavior Check Unique ID: llm_judge:rule:disclose_evidence_limits | The retrieved evidence did not cover the requested scope, so the rule applies. Hark stated the specific gap precisely: no per-flight rows, no delayed or cancelled counts, no destinations, and no page timestamp were returned, and that only the static shell text was available (E0008, E0009). It also framed the 30% figure as a standing advisory about arriving flights rather than as today's settled departure statistics (E0008, E0010), and offered a concrete path to close the gap (E0012). Nothing partial was presented as exhaustive. |
| ✅ | llm_judge:terminal | Hark fetched the exact URL the user named and received an HTTP 200 response, but the returned content was only the page chrome/navigation shell plus a static disclaimer — no flight rows, no delay or cancellation counts, no destinations, and no page timestamp (E0004). Hark then fetched the linked travel-impact advisory for whatever current operational context was published (E0007), reported honestly that the live board data could not be retrieved, delivered the advisory content that was retrieved, and offered a browser-based next step (E0008–E0012). Progress on the user's specific request was blocked by observed site/tool behavior after appropriate handling, not by Hark abandoning the task or fabricating data. |
| Tool | Calls | Durations (s) | Total (s) | Avg (s) |
|---|---|---|---|---|
| web_fetch | 2 | 1.0, 1.1 | 2.0 | 1.0 |
{
"tool_name": "web_fetch",
"tool_input": {
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"max_age_seconds": 3600,
"url": "https://www.flysfo.com/passengers/flight-info/flight-status"
},
"dispatch_id": "toolu_01BUvvgyBH9wwDura4XfH85z",
"parent_dispatch_id": "",
"handle": "",
"panel_kind": "web_fetch"
}{
"tool_name": "web_fetch",
"dispatch_id": "toolu_01BUvvgyBH9wwDura4XfH85z",
"status": "running",
"result": null,
"error": "",
"elapsed": null,
"fields": {
"progress": {
"message": "SFO departure delays/cancellations today",
"metadata": {
"browser_chain": false,
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}
},
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}
}{
"tool_name": "web_fetch",
"dispatch_id": "toolu_01BUvvgyBH9wwDura4XfH85z",
"status": "completed",
"result": {
"content": "Flight Status | San Francisco International Airport [Skip to main content](#page-content)\n\n\n\n[Travel Impact – FAA Reduced Arrival Rates and Runway Construction](/flight-info/alerts-advisories/travel-impact-faa-reduced-arrival-rates-and-runway-construction)\n\n\n\n- [Passengers](/passengers)\n- [Business](/business)\n- [About](/about)\n\n 19°C 66°F\n\n .\n\nUtility\n\n- [Map](/maps)\n\n\n\n\n\n- Current Language English\n - English\n - French\n - German\n - Italian\n - Japanese\n - Korean\n - Spanish\n - Vietnamese\n - Chinese, Simplified\n - Chinese, Traditional\n - Portuguese\n - Filipino\n\n[Travel Alerts](/travel-alerts) 6\n\nSelect LanguageEnglishChinese (Simplified)Chinese (Traditional)FilipinoFrenchGermanItalianJapaneseKoreanPortugueseSpanish\n\n [FlySFO Homepage](/)\n\n\n\nMain navigation\n\n- [Flights](/passengers/flight-info)\n- [Transportation](/passengers/ground-transportation)\n- [Parking at SFO](/passengers/parking)\n- [Shop/Dine/Relax](/passengers/shop-dine-relax)\n- [Maps](/maps)\n- [Services](/passengers/services-amenities)\n- [Travel Tips](/passengers/travel-tips)\n\n\n\n Site search Mobile menu toggle Toggle menu\n\n\n\n- [Passengers](/passengers)\n- [Business](/business)\n- [About](/about)\n\n- [Passengers](/passengers)\n - 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"content_length": 15922,
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"fields": {
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}
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"tool_name": "web_fetch",
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"content": "Travel Impact – FAA Reduced Arrival Rates and Runway Construction | San Francisco International Airport [Skip to main content](#page-content)\n\n\n\n[Travel Impact – FAA Reduced Arrival Rates and Runway Construction](/flight-info/alerts-advisories/travel-impact-faa-reduced-arrival-rates-and-runway-construction)\n\n\n\n- [Passengers](/passengers)\n- [Business](/business)\n- [About](/about)\n\n 19°C 66°F\n\n .\n\nUtility\n\n- [Map](/maps)\n\n\n\n\n\n- Current Language English\n - English\n - French\n - German\n - Italian\n - Japanese\n - Korean\n - Spanish\n - Vietnamese\n - Chinese, Simplified\n - Chinese, Traditional\n - Portuguese\n - Filipino\n\n[Travel Alerts](/travel-alerts) 6\n\nSelect LanguageEnglishChinese (Simplified)Chinese (Traditional)FilipinoFrenchGermanItalianJapaneseKoreanPortugueseSpanish\n\n [FlySFO Homepage](/)\n\n\n\nMain navigation - default\n\n- [Flights](/passengers/flight-info)\n - [Airlines at SFO](/passengers/flight-info/airlines-sfo)\n - [Flight Status](/passengers/flight-info/flight-status)\n - 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This, in combination with ongoing runway closures for construction work, is expected to cause delays of at least 30 minutes on approximately 30% of arriving flights. The runway is expected to reopen in early October 2026. Please check with your airline for specific flight details.\n\nVisit SFO's [Runway Constraints, Flight Patterns, and Operations](/about/airport-operations/policies-regulations/runway-constraints) page for details.\n\n\n\n\n\nJoin Our Email List\n\nStay up to date on new routes, improvement projects, museum exhibitions and much more!\n\n Name\n\n Email\n\n Sign Me Up\n\n\n\n\n\nFooter Menu - Left\n\n- [SFO Museum](https://www.sfomuseum.org/)\n\n\n\nConnect with Us:\n\n- [Facebook](https://www.facebook.com/flySFO)\n- [Instagram](https://www.instagram.com/flysfo/)\n- [Threads](https://www.threads.net/@flysfo)\n- [LinkedIn](https://www.linkedin.com/company/san-francisco-international-airport/)\n- [Twitter](https://twitter.com/flySFO)\n- [YouTube](https://www.youtube.com/user/SFOIntlAirport)\n- [Bluesky](https://bsky.app/profile/flysfo.bsky.social)\n\n\n\n\n\nMain navigation\n\n- [Passengers](/passengers)\n - [Flights](/passengers/flight-info)\n - [Transportation](/passengers/ground-transportation)\n - [Parking at SFO](/passengers/parking)\n - [Shop/Dine/Relax](/passengers/shop-dine-relax)\n - [Maps](/maps)\n - [Services](/passengers/services-amenities)\n - [Travel Tips](/passengers/travel-tips)\n\n- [Business](/business)\n - [Doing Business at SFO](/business/doing-business-sfo)\n - [Small Business Development](/business/small-business-development)\n - [Current Opportunities](/business/current-opportunities)\n - [Construction Opportunities](/business/sfo-construction-opportunities)\n - [Air Services](/business/aviation-support-services)\n\n- [About](/about)\n - [About SFO](/about/about-sfo)\n - [Land Acknowledgement](/about/land-acknowledgement)\n - [Airport Commission](/about/airport-commission)\n - [Technology](/about/technology)\n - [Airport Operations](/about/airport-operations)\n - [Finances](/about/finances)\n - [Construction](/about/construction)\n - [Sustainability](https://sustainability.flysfo.com/)\n - [Planning Division](https://planning.flysfo.com/)\n - [Community & Noise](/about/community-noise)\n - [Media](/about/media)\n - [Careers](/about/careers)\n\n\n\nFooter Menu - Right\n\n- [Accessibility](/passengers/services-amenities/accessibility)\n- [Sitemap](/sitemap)\n- [Privacy & Cookie Use](/privacy-cookie-policy)\n- [Lost & Found](/lost-and-found)\n- [Public Notices](/about/airport-commission/public-notices)\n- [Agendas](/about/airport-commission/agendas-minutes-recordings)\n- [Contact Us](/about/contact-sfo)\n- [FAQ](/faqs)\n\n\n\n© 2026 San Francisco International Airport\n\n Cookie Preferences\n\n [FlySFO Homepage](/)",
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"description": "|The FAA recently increased the separation between aircraft landing at SFO. This, in combination with ongoing runway closures for construction work, is expected to cause delays of at least 30 minutes on approximately 30% of arriving flights. The runway is expected to reopen in early October 2026. Please check with your airline for specific flight details.",
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"title": "Travel Impact – FAA Reduced Arrival Rates and Runway Construction | San Francisco International Airport",
"url": "https://www.flysfo.com/flight-info/alerts-advisories/travel-impact-faa-reduced-arrival-rates-and-runway-construction"
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