{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":488,"cluster_id":4880001403,"lat":17.895,"lng":76.375},"signals":[{"signal":"temperature","resolved_at":"2026-08-27T05:15:00Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":488,"cluster_id":4880001403,"value":{"temperature_c_idw":26.6336},"valid_time":{"kind":"valid_time","requested":"2026-08-27T05:15:00Z","served_window_start_utc":"2026-08-27T04:16:51+00:00","served_window_end_utc":"2026-08-27T05:16:51+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":1985,"pin_sha256":"aaea912341f7bcf2746fdf673dd8f097e5b4d31775c59876abf1dfb54cb64f8c","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-27T05:16:51+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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