{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":498,"cluster_id":4980000609,"lat":20.505,"lng":79.165},"signals":[{"signal":"temperature","resolved_at":"2026-09-03T20:04:06Z","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` 2026-09-03T20:04:06Z is after the latest witnessed instant (2026-09-03T19:16:46+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-09-03T20:04:06Z","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` 2026-09-03T20:04:06Z is after the latest witnessed instant (2026-09-03T19:16:46+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall","resolved_at":"2026-09-03T20:04:06Z","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` 2026-09-03T20:04:06Z is after the latest witnessed instant (2026-09-03T02:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-03T20:04:06Z","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` 2026-09-03T20:04:06Z is after the latest witnessed instant (2026-09-03T20:00:52+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"weather_google","resolved_at":"2026-09-03T20:04:06Z","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":498,"cluster_id":4980000609,"value":{"temperature_c_idw":24.5623,"rainfall_mm_24h_idw":7.5968,"humidity_pct_idw":91.2475,"wind_speed_kmph_idw":9.8369},"valid_time":{"kind":"valid_time","requested":"2026-09-03T20:04:06Z","served_window_start_utc":"2026-09-03T19:06:37+00:00","served_window_end_utc":"2026-09-03T20:06:37+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":1894,"pin_sha256":"b1d435ff448d01135bc867957e4bc5f7ded4a8a5a5fd37d0b35a55d7d160480f","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-03T20:06:37+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}}]}