{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":473,"cluster_id":4730009745,"lat":20.705,"lng":79.515},"signals":[{"signal":"temperature","resolved_at":"2026-08-09T01:56:42Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":473,"cluster_id":4730009745,"value":{"temperature_c_idw":25.8476},"valid_time":{"kind":"valid_time","requested":"2026-08-09T01:56:42Z","served_window_start_utc":"2026-08-09T01:16:40+00:00","served_window_end_utc":"2026-08-09T02:16:40+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":1553,"pin_sha256":"375df5ab64ec850297d06b86ce807309a6113bceb0539353ad871b941c902443","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-09T02:16:40+00:00","support_kind":"imd_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; 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