DC Hub: Data Center, Power Grid & Energy Intelligence

Live Grid Data

get_grid_data

Read-onlyIdempotent

Fetches live power demand and fuel-mix data for a single grid, such as US ISOs, utilities, or international zones, with timestamps and a 24-hour demand curve where available.

Instructions

Use this when the user asks for live electricity grid data (power demand, fuel mix) for one grid: the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), TVA, BPA, 40+ US utility balancing authorities (e.g. AZPS, SOCO, DUK, FPL, or a city: PHOENIX, ATLANTA), Canada (IESO, AESO, HYDROQUEBEC), Great Britain (NGESO), any ENTSO-E bidding zone (EU_DE_LU, EU_FR, EU_NL ...), Taiwan (TAIPOWER), Japan (OCCTO), South Korea (KEPCO-KR), Brazil (ONS), Australia (AEMO) or Singapore (EMA). US ISOs and EIA regions return EIA hourly fuel mix, demand and the 24h curve; other grids return each feed's newest reading per metric, each with its own timestamp. For PJM it also returns installed_capacity_mw: EIA-860M installed generating capacity (net summer MW of operating generators for the report month in installed_capacity_mw_period). That is not PJM committed capacity, which is listed in licence_withheld with no value. Raw telemetry for one grid; do NOT use for power-availability, time-to-power or interconnection-queue analysis (use get_grid_intelligence), nor for retail/gas pricing (use get_energy_prices). To rank many grids at once use get_grid_scoreboard.

Input Schema

Name	Required	Description
`iso`	No	Grid code (required): a US ISO (ERCOT, PJM, MISO, CAISO, SPP, NYISO, ISONE), TVA, BPA, a utility BA or city (AZPS, PHOENIX), or a non-US grid (IESO, AESO, HYDROQUEBEC, NGESO, EU_DE_LU, TAIPOWER, OCCTO, KEPCO-KR, ONS, AEMO, EMA)
`metric`	No	Optional metric focus, e.g. fuel_mix, demand, demand_curve
`period`	No	Optional time window for the metric, e.g. 24h

Output Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed10 schema fields changedv2.12.45Oct 22, 2026

changedInput schema / properties / iso / description

Previous value: -"ISO/RTO grid region (required): ERCOT, PJM, MISO, CAISO, SPP, NYISO, ISONE"New value: +"Grid code (required): a US ISO (ERCOT, PJM, MISO, CAISO, SPP, NYISO, ISONE), TVA, BPA, a utility BA or city (AZPS, PHOENIX), or a non-US grid (IESO, AESO, HYDROQUEBEC, NGESO, EU_DE_LU, TAIPOWER, OCCTO, KEPCO-KR, ONS, AEMO, EMA)"

changedOutput schema / additionalProperties
```
Previous value: -{}New value: +true
```

removedOutput schema / description

Removed value: -"DC Hub envelope: tool data fields ride at the top level beside these keys."

removedOutput schema / properties / _entity

Removed value: -{
-  "description": "Payload class (facility|market|iso_grid|queue_results|deal|report|response); branch on it.",
-  "type": "string"
-}

removedOutput schema / properties / _front_door

Removed value: -{
-  "additionalProperties": {},
-  "description": "First-tool hint: plan_query(intent) returns the ordered plan.",
-  "properties": {},
-  "type": "object"
-}

removedOutput schema / properties / _return_loop

Removed value: -{
-  "additionalProperties": {},
-  "description": "Next-session delta call (get_changes).",
-  "properties": {},
-  "type": "object"
-}

removedOutput schema / properties / citation

Removed value: -{
-  "anyOf": [
-    {
-      "additionalProperties": {},
-      "properties": {},
-      "type": "object"
-    },
-    {
-      "type": "string"
-    }
-  ],
-  "description": "How to attribute DC Hub: {source, url, license, cite_as, retrieved_at}, or the attribution line as a string."
-}

removedOutput schema / properties / provenance

Removed value: -{
-  "additionalProperties": {},
-  "description": "Source, method, as_of, verification_counts, license, cite_as; quote it when citing.",
-  "properties": {},
-  "type": "object"
-}

removedOutput schema / properties / quota

Removed value: -{
-  "additionalProperties": {},
-  "description": "Caller quota state (remaining calls, tier).",
-  "properties": {},
-  "type": "object"
-}

removedOutput schema / properties / site_evaluation_handoff

Removed value: -{
-  "anyOf": [
-    {
-      "items": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      },
-      "type": "array"
-    },
-    {
-      "additionalProperties": {},
-      "properties": {},
-      "type": "object"
-    }
-  ],
-  "description": "Follow-up calls [{tool, parameters, why}] when the payload carries coordinates."
-}

Changed8 schema fields changedv2.12.43Oct 15, 2026

changedOutput schema / description

Previous value: -"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."New value: +"DC Hub envelope: tool data fields ride at the top level beside these keys."

changedOutput schema / properties / _entity / description

Previous value: -"Payload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest."New value: +"Payload class (facility|market|iso_grid|queue_results|deal|report|response); branch on it."

changedOutput schema / properties / _front_door / description

Previous value: -"In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan."New value: +"First-tool hint: plan_query(intent) returns the ordered plan."

changedOutput schema / properties / _return_loop / description

Previous value: -"Suggested next-session delta call (get_changes since=24h) so you pull only what changed."New value: +"Next-session delta call (get_changes)."

changedOutput schema / properties / citation / description

Previous 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."New value: +"How to attribute DC Hub: {source, url, license, cite_as, retrieved_at}, or the attribution line as a string."

changedOutput schema / properties / provenance / description

Previous value: -"Collection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing."New value: +"Source, method, as_of, verification_counts, license, cite_as; quote it when citing."

changedOutput schema / properties / quota / description

Previous value: -"Caller quota state (remaining calls, tier) when available."New value: +"Caller quota state (remaining calls, tier)."

changedOutput schema / properties / site_evaluation_handoff / description

Previous value: -"Pre-built follow-up calls (analyze_site / get_water_risk args) when the payload carries coordinates — an array of {tool, parameters, why} entries."New value: +"Follow-up calls [{tool, parameters, why}] when the payload carries coordinates."

Changed2 schema fields changedAug 30, 2026

removedInput schema / $schema

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

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"
+}

Changed3 schema fields changedv2.3.6Jul 2, 2026

addedInput schema / properties / iso / description

Added value: +"ISO/RTO grid region (required): ERCOT, PJM, MISO, CAISO, SPP, NYISO, ISONE"

addedInput schema / properties / metric / description

Added value: +"Optional metric focus, e.g. fuel_mix, demand, demand_curve"

addedInput schema / properties / period / description

Added value: +"Optional time window for the metric, e.g. 24h"

First observedv2.1.19Jun 8, 2026

TDQS

A4.6/5.0

Behavior5/5

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

Annotations already declare readOnly/idempotent/non-destructive, so the description goes further and discloses the return semantics that matter: US ISOs/EIA regions return EIA hourly fuel mix plus 24h curve, while other grids return each feed's newest reading per metric with its own timestamp. It even pre-empts a likely misinterpretation by noting installed_capacity_mw is EIA-860M net summer capacity for the report month, not PJM committed capacity (which appears value-less in licence_withheld).

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?

Long but front-loaded: the trigger condition and scope come first, followed by coverage, then return behavior, then exclusions. Every clause is doing work, though the installed_capacity_mw/licence_withheld passage is dense enough that it borders on over-specification for a first-read.

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

Completeness5/5

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

For an open-world tool spanning hundreds of grid codes, the description covers coverage, per-family return differences, a known data caveat, and routing to three alternatives. With an output schema present, it has no obligation to describe return field structure, and nothing an agent needs to call it correctly is missing.

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 schema already documents iso, metric and period, making 3 the baseline. The description adds some value by expanding the accepted grid-code vocabulary (EU_DE_LU bidding zones, city names like PHOENIX/ATLANTA) and naming the metrics produced (fuel_mix, demand, demand_curve), but it does not explain how 'metric' or 'period' alter the response shape.

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?

Opens with a specific verb and resource (live electricity grid data: power demand, fuel mix) and scopes it to one grid, then enumerates exactly which grid families are supported. It also names the sibling tools it is not (get_grid_intelligence, get_energy_prices, get_grid_scoreboard), so an agent can distinguish it without opening any schema.

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?

Explicit when-to-use (user asks for live demand/fuel mix for one grid) and explicit when-not-to-use, each with the correct alternative named: power-availability/queue analysis -> get_grid_intelligence, retail/gas pricing -> get_energy_prices, ranking many grids -> get_grid_scoreboard. Nothing is left to inference.

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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