Eia Energy

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• EIA_API_KEY — Free API key from api.eia.gov. Required — all requests use this as the api_key query parameter.
• EIA_DATASET_TTL_SECONDS — Sliding per-dataframe TTL in seconds, extended by every query that references the dataframe. At most 31536000 (365 days).
• EIA_DATAFRAME_DROP_ENABLED — Set to 'true' to expose eia_dataframe_drop for manual canvas cleanup. Has no effect with CANVAS_PROVIDER_TYPE=none.
• EIA_CANVAS_MAX_ROWS — Cumulative row ceiling for eia_query_route DataCanvas staging on a stage: true call. Five requests at EIA's 5000-row-per-request ceiling. At most 250000.
• EIA_FACET_VALUE_CAP — Facet values eia_describe_route returns per facet before truncating. Page past it with the tool's facet and values_offset inputs, or narrow a facet with values_query. At most 1000.
• EIA_CLAMP_LIMITS — Lower an over-cap eia_query_route length, eia_dataframe_query row_limit or preview, or eia_search_routes limit to its cap with a notice. 'false' advertises and enforces each cap as a schema maximum instead.
• CANVAS_PROVIDER_TYPE — DataCanvas provider. 'duckdb', the default, registers eia_dataframe_describe and eia_dataframe_query and lets eia_query_route stage rows when called with stage: true; eia_dataframe_drop also requires EIA_DATAFRAME_DROP_ENABLED=true. 'none' disables DataCanvas.
• MCP_LOG_LEVEL — Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').