DC Hub — Data Center & Energy Intelligence

Get Gas Economics

get_gas_economics

Read-onlyIdempotent

Retrieve Henry Hub spot, regional basis differential, and delivered industrial plus electric gas tariff for a US data-center market to assess behind-the-meter gas-fired power input costs.

Instructions

Behind-the-meter / gas-fired power inputs for a US data-center market: Henry Hub spot, regional basis differential, and the delivered industrial + electric gas tariff ($/MMBtu), each with its own source label. Pass market= (e.g. "northern-virginia", "dallas", "phoenix"). ★ WITHDRAWN 2026-08-08: the gas-to-grid levelized cost ($/MWh across CCGT/peaker heat-rate scenarios) is NO LONGER RETURNED. Five surfaces published a $/MWh for the same market on the same day up to 5.5x apart because each chose the burner-tip price by a different rule, with no sanity gate — this endpoint served a physically impossible $6.73/MWh for Phoenix stamped data_basis: "live". The heat-rate arithmetic was correct; the input price selection was not. The $/MMBtu layers are sourced and still returned; gas_to_grid_status carries the reason. DO NOT quote a cached $/MWh figure, and do not derive one yourself from the $/MMBtu without saying that you did. Do NOT use for the electricity grid fuel mix (use get_grid_data).

Input Schema

TableJSON Schema

Name	Required	Description	Default
`market`	Yes	Market slug (metro), e.g. northern-virginia, dallas, phoenix — valid slugs come from rank_markets / get_market_dcpi_rank
`heat_rate_btu_per_kwh`	No	Optional custom generator heat rate in Btu/kWh for the gas-to-grid $/MWh scenario, e.g. 6800 (avg CCGT)

Output Schema

TableJSON Schema

Name	Required	Description
`quota`	No	Caller quota state (remaining calls, tier) when available.
`_entity`	No	Payload class discriminator (e.g. facility\|market\|iso_grid\|queue_results\|deal\|report\|response) — branch on this before parsing the rest.
`citation`	No	Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload. Normally an OBJECT {source, url, license, cite_as, retrieved_at}; a bare string is accepted and carries the attribution line itself.
`provenance`	No	Collection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing.
`_front_door`	No	In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan.
`_return_loop`	No	Suggested next-session delta call (get_changes since=24h) so you pull only what changed.
`site_evaluation_handoff`	No	Pre-built follow-up calls (analyze_site / get_water_risk args) when the payload carries coordinates — an array of {tool, parameters, why} entries.

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedAug 30, 2026

removedInput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

addedInput schema / required
```
Added value: +[
+  "market"
+]
```

removedOutput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

Changed5 schema fields changedv2.3.20Aug 14, 2026

removedOutput schema / properties / citation / additionalProperties
```
Removed value: -{}
```

addedOutput schema / properties / citation / anyOf

Added value: +[
+  {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  },
+  {
+    "type": "string"
+  }
+]

changedOutput schema / properties / citation / description

Previous value: -"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload."New value: +"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload. Normally an OBJECT {source, url, license, cite_as, retrieved_at}; a bare string is accepted and carries the attribution line itself."

removedOutput schema / properties / citation / properties
```
Removed value: -{}
```
removedOutput schema / properties / citation / type
```
Removed value: -"object"
```

Changed1 schema field changedv2.3.12Jul 28, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": {},
+  "description": "DC Hub envelope: structuredContent mirrors the JSON payload in content[0].text — tool-specific data fields ride at the top level alongside these envelope keys.",
+  "properties": {
+    "_entity": {
+      "description": "Payload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest.",
+      "type": "string"
+    },
+    "_front_door": {
+      "additionalProperties": {},
+      "description": "In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan.",
+      "properties": {},
+      "type": "object"
+    },
+    "_return_loop": {
+      "additionalProperties": {},
+      "description": "Suggested next-session delta call (get_changes since=24h) so you pull only what changed.",
+      "properties": {},
+      "type": "object"
+    },
+    "citation": {
+      "additionalProperties": {},
+      "description": "Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload.",
+      "properties": {},
+      "type": "object"
+    },
+    "provenance": {
+      "additionalProperties": {},
+      "description": "Collection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing.",
+      "properties": {},
+      "type": "object"
+    },
+    "quota": {
+      "additionalProperties": {},
+      "description": "Caller quota state (remaining calls, tier) when available.",
+      "properties": {},
+      "type": "object"
+    },
+    "site_evaluation_handoff": {
+      "anyOf": [
+        {
+          "items": {
+            "additionalProperties": {},
+            "properties": {},
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        }
+      ],
+      "description": "Pre-built follow-up calls (analyze_site / get_water_risk args) when the payload carries coordinates — an array of {tool, parameters, why} entries."
+    }
+  },
+  "type": "object"
+}

Changed2 schema fields changedv2.3.6Jul 2, 2026

addedInput schema / properties / heat_rate_btu_per_kwh / description

Added value: +"Optional custom generator heat rate in Btu/kWh for the gas-to-grid $/MWh scenario, e.g. 6800 (avg CCGT)"

addedInput schema / properties / market / description

Added value: +"Market slug (metro), e.g. northern-virginia, dallas, phoenix — valid slugs come from rank_markets / get_market_dcpi_rank"

Addedv2.3.1Jun 23, 2026

TDQS

A4.5/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The description discloses a significant behavioral trait: the gas-to-grid $/MWh output was withdrawn after serving inconsistent and physically impossible values. It explains the withdrawal date, the reason, and the current behavior without contradicting the read-only/idempotent annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is longer than average, but the extra length is mostly operational warning content that prevents misuse. The resource definition is front-loaded, and the withdrawal guidance is clearly delimited, though it could be tightened.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The annotations and output schema already cover read-only behavior and return structure. The description supplies critical withdrawn-field context and an explicit exclusion to get_grid_data. The main gap is the unresolved role of heat_rate_btu_per_kwh in the schema relative to the withdrawn $/MWh output.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3. The description adds market slug examples and clarifies which data layers still exist, but it does not explicitly explain how the optional heat_rate_btu_per_kwh parameter should be treated now that the gas-to-grid $/MWh scenario is no longer returned.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific resource: behind-the-meter gas-fired power inputs for US data-center markets, and enumerates the returned $/MMBtu components (Henry Hub spot, regional basis differential, delivered industrial + electric gas tariff). It also differentiates itself from get_grid_data, so an agent can select it confidently.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly says not to use this tool for the electricity grid fuel mix and points to get_grid_data as the alternative. It also gives clear operational constraints: do not quote cached $/MWh figures, do not derive them without attribution, and rely on gas_to_grid_status for the reason.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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