{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":470,"cluster_id":4700007254,"lat":19.125,"lng":76.035},"signals":[{"signal":"temperature","resolved_at":"2026-07-21T00:25:55Z","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` 2026-07-21T00:25:55Z is after the latest witnessed instant (2026-07-21T00:24:31+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-07-21T00:25:55Z","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` 2026-07-21T00:25:55Z is after the latest witnessed instant (2026-07-21T00:24:31+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall","resolved_at":"2026-07-21T00:25:55Z","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` 2026-07-21T00:25:55Z is after the latest witnessed instant (2026-07-18T06:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-21T00:25:55Z","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` 2026-07-21T00:25:55Z is after the latest witnessed instant (2026-07-21T00:00:53+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"weather_google","resolved_at":"2026-07-21T00:25:55Z","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":470,"cluster_id":4700007254,"value":{"temperature_c_idw":23.66,"rainfall_mm_24h_idw":8.347,"humidity_pct_idw":89.5201,"wind_speed_kmph_idw":16.3467},"valid_time":{"kind":"valid_time","requested":"2026-07-21T00:25:55Z","served_window_start_utc":"2026-07-21T00:06:24+00:00","served_window_end_utc":"2026-07-21T01:06:24+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":819,"pin_sha256":"3cc1ef7132b6cd283bc523e0662d3670923afe80f171328018b8a133893e1341","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-21T01:06:24+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}}]}