{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":489,"cluster_id":4890004331,"lat":19.495,"lng":76.525},"signals":[{"signal":"temperature","resolved_at":"2026-07-17T02:04:40Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-07-17T02:04:40Z is after the latest witnessed instant (2026-07-17T01:16:43+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-07-17T02:04:40Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-07-17T02:04:40Z is after the latest witnessed instant (2026-07-17T01:16:43+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall","resolved_at":"2026-07-17T02:04:40Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-07-17T02:04:40Z is after the latest witnessed instant (2026-07-14T03:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-17T02:04:40Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-07-17T02:04:40Z is after the latest witnessed instant (2026-07-17T00:00:53+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"weather_google","resolved_at":"2026-07-17T02:04:40Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"weather_google","unit":"google_weather_mixed","admin_code":489,"cluster_id":4890004331,"value":{"temperature_c_idw":26.4331,"rainfall_mm_24h_idw":1.1886,"humidity_pct_idw":78.9331,"wind_speed_kmph_idw":17.3489},"valid_time":{"kind":"valid_time","requested":"2026-07-17T02:04:40Z","served_window_start_utc":"2026-07-17T01:06:46+00:00","served_window_end_utc":"2026-07-17T02:06:46+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"google_weather_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3,"rainfall_mm_24h_n_stations":3,"humidity_pct_n_stations":3,"wind_speed_kmph_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_google_v1","pin_seq":724,"pin_sha256":"a30996222cb46e1075cb0d3e38d09d9c56d94a716990f5f2f2f44666e06de2fc","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-17T02:06:46+00:00","support_kind":"google_weather_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}}]}