DC Hub

Grid Intelligence

get_grid_intelligence

Read-onlyIdempotent

Use this when the user asks about grid capacity, power availability, headroom or time-to-power in a US ISO (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE) or a market's grid. Returns live demand, fuel mix, queue depth, DCPI excess-power and constraint scores, time-to-power, reserve margin. avg_time_to_power_months and avg_queue_wait_months are DIFFERENT measurements; quote the one you mean. With a free key, a few full briefs a day; keyless gets a trimmed preview. Unlimited needs a paid key. Ex: "PJM headroom for 200 MW?" iso must be a US ISO (ERCOT, PJM, CAISO, MISO, SPP, NYISO, ISO-NE); other codes return region_not_covered. Free = preview.

Input Schema

Name	Required	Description
`iso`	No	Alias for region_id — the ISO/RTO or balancing-authority code
`market`	No	Market NAME or metro slug instead of a grid code, e.g. "Ashburn", "northern-virginia", "dallas". Resolved to its ISO through the published DCPI market row before the brief is built; the answer carries a resolved_from block naming what it…
`region`	No	Alias for region_id — the ISO/RTO or balancing-authority code
`mpp_pay`	No	Per-call payment quote (Stripe MPP): true returns a signed payment challenge instead of the free preview; no money moves. Set it only after your human has explicitly approved paying for this call.
`region_id`	No	Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), an EIA balancing-authority code (e.g.
`mpp_credential`	No	Per-call payment (Stripe MPP): the Shared Payment Token for challenges[0]; pays that challenge for this one call. Send it only with your human's explicit approval of the charge.

Output Schema

Name	Required	Description	Default
`ok`	No
`iso`	No
`as_of`	No
`taste`	No
`cite_as`	No
`iso_name`	No
`withheld`	No
`completeness`	No
`demand_period`	No
`withheld_total`	No
`free_preview_only`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 22, 2026

addedInput schema / properties / mpp_credential

Added value: +{
+  "description": "Per-call payment (Stripe MPP): the Shared Payment Token for challenges[0]; pays that challenge for this one call. Send it only with your human's explicit approval of the charge.",
+  "type": "string"
+}

addedInput schema / properties / mpp_pay

Added value: +{
+  "description": "Per-call payment quote (Stripe MPP): true returns a signed payment challenge instead of the free preview; no money moves. Set it only after your human has explicitly approved paying for this call.",
+  "type": "boolean"
+}

Changed2 schema fields changedOct 22, 2026

removedInput schema / properties / mpp_credential

Removed value: -{
-  "description": "Per-call payment (Stripe MPP): the Shared Payment Token for challenges[0]; pays that challenge for this one call. Send it only with your human's explicit approval of the charge.",
-  "type": "string"
-}

removedInput schema / properties / mpp_pay

Removed value: -{
-  "description": "Per-call payment quote (Stripe MPP): true returns a signed payment challenge instead of the free preview; no money moves. Set it only after your human has explicitly approved paying for this call.",
-  "type": "boolean"
-}

Changed2 schema fields changedOct 20, 2026

changedInput schema / properties / mpp_credential / description

Previous value: -"Stripe MPP step 2: the Shared Payment Token minted for challenges[0]; pays that challenge for this one call."New value: +"Per-call payment (Stripe MPP): the Shared Payment Token for challenges[0]; pays that challenge for this one call. Send it only with your human's explicit approval of the charge."

changedInput schema / properties / mpp_pay / description

Previous value: -"Stripe MPP step 1: true returns a signed per-call payment challenge (a quote; no money moves) instead of the free preview. Agents only."New value: +"Per-call payment quote (Stripe MPP): true returns a signed payment challenge instead of the free preview; no money moves. Set it only after your human has explicitly approved paying for this call."

Changed7 schema fields changedOct 19, 2026
- removedOutput schema / properties / _entity
```
Removed value: -{
-  "type": "string"
-}
```
- removedOutput schema / properties / _front_door
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / _return_loop
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / citation
```
Removed value: -{}
```
- removedOutput schema / properties / provenance
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / quota
```
Removed value: -{
-  "type": "object"
-}
```
- removedOutput schema / properties / site_evaluation_handoff
```
Removed value: -{}
```

Changed42 schema fields changedOct 18, 2026

changedInput schema / properties / market / description

Previous value: -"Market NAME or metro slug instead of a grid code, e.g. \"Ashburn\", \"northern-virginia\", \"dallas\". Resolved to its ISO through the published DCPI market row before the brief is built; the answer carries a resolved_from block naming what it resolved to. Not an alias for region_id — \"Ashburn\" is not a grid code."New value: +"Market NAME or metro slug instead of a grid code, e.g. \"Ashburn\", \"northern-virginia\", \"dallas\". Resolved to its ISO through the published DCPI market row before the brief is built; the answer carries a resolved_from block naming what it…"

changedInput schema / properties / region_id / description

Previous value: -"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), an EIA balancing-authority code (e.g. SOCO, DUK, AZPS, TVA), or the PJM Dominion zone region_id=\"PJM-DOM\" for live Ashburn / Northern Virginia zone load + real-time LMP (the Ashburn / Northern Virginia zone, not visible in EIA)"New value: +"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), an EIA balancing-authority code (e.g."

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

removedOutput schema / properties / _entity / description

Removed value: -"Payload class (facility|market|iso_grid|queue_results|deal|report|response); branch on it."

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

removedOutput schema / properties / _front_door / description

Removed value: -"First-tool hint: plan_query(intent) returns the ordered plan."

removedOutput schema / properties / _front_door / properties
```
Removed value: -{}
```
removedOutput schema / properties / _return_loop / additionalProperties
```
Removed value: -{}
```
removedOutput schema / properties / _return_loop / description
```
Removed value: -"Next-session delta call (get_changes)."
```
removedOutput schema / properties / _return_loop / properties
```
Removed value: -{}
```

removedOutput schema / properties / as_of / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / as_of / description
```
Removed value: -"Timestamp of the reading"
```

removedOutput schema / properties / citation / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  },
-  {
-    "type": "string"
-  }
-]

removedOutput schema / properties / citation / description

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

removedOutput schema / properties / cite_as / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / cite_as / description
```
Removed value: -"Ready-made attribution line"
```

removedOutput schema / properties / completeness / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / completeness / description
```
Removed value: -"Share of the payload this tier got"
```

removedOutput schema / properties / demand_period / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / demand_period / description
```
Removed value: -"Period of the demand reading"
```

removedOutput schema / properties / free_preview_only / anyOf

Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / free_preview_only / description
```
Removed value: -"true when only the free preview was served"
```

removedOutput schema / properties / iso / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / iso / description
```
Removed value: -"ISO / grid operator code"
```

removedOutput schema / properties / iso_name / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / iso_name / description
```
Removed value: -"Grid operator full name"
```

removedOutput schema / properties / ok / anyOf

Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / ok / description

Removed value: -"true when the ISO lookup executed"

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

removedOutput schema / properties / provenance / description

Removed value: -"Source, method, as_of, verification_counts, license, cite_as; quote it when citing."

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

removedOutput schema / properties / quota / description

Removed value: -"Caller quota state (remaining calls, tier)."

removedOutput schema / properties / quota / properties
```
Removed value: -{}
```

removedOutput schema / properties / site_evaluation_handoff / anyOf

Removed value: -[
-  {
-    "items": {
-      "additionalProperties": {},
-      "properties": {},
-      "type": "object"
-    },
-    "type": "array"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  }
-]

removedOutput schema / properties / site_evaluation_handoff / description

Removed value: -"Follow-up calls [{tool, parameters, why}] when the payload carries coordinates."

removedOutput schema / properties / taste / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {},
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / taste / description
```
Removed value: -"Free-tier preview fields"
```

removedOutput schema / properties / withheld / anyOf

Removed value: -[
-  {
-    "items": {},
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / withheld / description
```
Removed value: -"Fields withheld on this tier"
```

removedOutput schema / properties / withheld_total / anyOf

Removed value: -[
-  {
-    "anyOf": [
-      {
-        "type": "number"
-      },
-      {
-        "type": "string"
-      }
-    ]
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / withheld_total / description
```
Removed value: -"How many fields were withheld"
```

Changed1 schema field changedOct 9, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": {},
+  "properties": {
+    "_entity": {
+      "description": "Payload class (facility|market|iso_grid|queue_results|deal|report|response); branch on it.",
+      "type": "string"
+    },
+    "_front_door": {
+      "additionalProperties": {},
+      "description": "First-tool hint: plan_query(intent) returns the ordered plan.",
+      "properties": {},
+      "type": "object"
+    },
+    "_return_loop": {
+      "additionalProperties": {},
+      "description": "Next-session delta call (get_changes).",
+      "properties": {},
+      "type": "object"
+    },
+    "as_of": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Timestamp of the reading"
+    },
+    "citation": {
+      "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."
+    },
+    "cite_as": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Ready-made attribution line"
+    },
+    "completeness": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Share of the payload this tier got"
+    },
+    "demand_period": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Period of the demand reading"
+    },
+    "free_preview_only": {
+      "anyOf": [
+        {
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "true when only the free preview was served"
+    },
+    "iso": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "ISO / grid operator code"
+    },
+    "iso_name": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Grid operator full name"
+    },
+    "ok": {
+      "anyOf": [
+        {
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "true when the ISO lookup executed"
+    },
+    "provenance": {
+      "additionalProperties": {},
+      "description": "Source, method, as_of, verification_counts, license, cite_as; quote it when citing.",
+      "properties": {},
+      "type": "object"
+    },
+    "quota": {
+      "additionalProperties": {},
+      "description": "Caller quota state (remaining calls, tier).",
+      "properties": {},
+      "type": "object"
+    },
+    "site_evaluation_handoff": {
+      "anyOf": [
+        {
+          "items": {
+            "additionalProperties": {},
+            "properties": {},
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        }
+      ],
+      "description": "Follow-up calls [{tool, parameters, why}] when the payload carries coordinates."
+    },
+    "taste": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Free-tier preview fields"
+    },
+    "withheld": {
+      "anyOf": [
+        {
+          "items": {},
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Fields withheld on this tier"
+    },
+    "withheld_total": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "How many fields were withheld"
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedOct 8, 2026

changedInput schema / properties / region_id / description

Previous value: -"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), an EIA balancing-authority code (e.g. SOCO, DUK, AZPS, TVA), or the PJM Dominion zone region_id=\"PJM-DOM\" for live Ashburn / Northern Virginia zone load + real-time LMP (the world's #1 DC market, invisible in EIA)"New value: +"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), an EIA balancing-authority code (e.g. SOCO, DUK, AZPS, TVA), or the PJM Dominion zone region_id=\"PJM-DOM\" for live Ashburn / Northern Virginia zone load + real-time LMP (the Ashburn / Northern Virginia zone, not visible in EIA)"

Changed2 schema fields changedOct 7, 2026

changedInput schema / properties / mpp_credential / description

Previous value: -"Autonomous payment (Stripe MPP), step 2: the Shared Payment Token you minted for challenges[0]. Set it here to pay that challenge for this single call and receive the full result — no API key, no subscription, no human. One payment covers one call."New value: +"Stripe MPP step 2: the Shared Payment Token minted for challenges[0]; pays that challenge for this one call."

changedInput schema / properties / mpp_pay / description

Previous value: -"Autonomous payment (Stripe MPP), step 1: set true to receive a signed per-call payment challenge (the challenge states the amount) for this call instead of the free preview. No money moves — a challenge is a price quote. Humans never set this, so it does not affect the normal free/trial funnel."New value: +"Stripe MPP step 1: true returns a signed per-call payment challenge (a quote; no money moves) instead of the free preview. Agents only."

Changed1 schema field changedSep 29, 2026

changedOutput schema / (root)

Previous value: -{
-  "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": {
-      "anyOf": [
-        {
-          "additionalProperties": {},
-          "properties": {},
-          "type": "object"
-        },
-        {
-          "type": "string"
-        }
-      ],
-      "description": "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": {
-      "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"
-}New value: +null

Changed2 schema fields changedSep 29, 2026

changedInput schema / properties / mpp_credential / description

Previous value: -"Autonomous payment (Stripe MPP), step 2: the Shared Payment Token you minted for challenges[0]. Set it here to pay $0.50 for this single call and receive the full result — no API key, no subscription, no human. One payment covers one call."New value: +"Autonomous payment (Stripe MPP), step 2: the Shared Payment Token you minted for challenges[0]. Set it here to pay that challenge for this single call and receive the full result — no API key, no subscription, no human. One payment covers one call."

changedInput schema / properties / mpp_pay / description

Previous value: -"Autonomous payment (Stripe MPP), step 1: set true to receive a signed $0.50 payment challenge for this call instead of the free preview. No money moves — a challenge is a price quote. Humans never set this, so it does not affect the normal free/trial funnel."New value: +"Autonomous payment (Stripe MPP), step 1: set true to receive a signed per-call payment challenge (the challenge states the amount) for this call instead of the free preview. No money moves — a challenge is a price quote. Humans never set this, so it does not affect the normal free/trial funnel."

Changed1 schema field changedSep 20, 2026

addedInput schema / anyOf

Added value: +[
+  {
+    "properties": {
+      "region_id": {}
+    },
+    "required": [
+      "region_id"
+    ]
+  },
+  {
+    "properties": {
+      "iso": {}
+    },
+    "required": [
+      "iso"
+    ]
+  },
+  {
+    "properties": {
+      "region": {}
+    },
+    "required": [
+      "region"
+    ]
+  },
+  {
+    "properties": {
+      "market": {}
+    },
+    "required": [
+      "market"
+    ]
+  }
+]

Changed1 schema field changedAug 30, 2026

addedInput schema / properties / market

Added value: +{
+  "description": "Market NAME or metro slug instead of a grid code, e.g. \"Ashburn\", \"northern-virginia\", \"dallas\". Resolved to its ISO through the published DCPI market row before the brief is built; the answer carries a resolved_from block naming what it resolved to. Not an alias for region_id — \"Ashburn\" is not a grid code.",
+  "type": "string"
+}

Changed2 schema fields changedAug 21, 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#"

Changed2 schema fields changedAug 17, 2026

addedInput schema / properties / mpp_credential

Added value: +{
+  "description": "Autonomous payment (Stripe MPP), step 2: the Shared Payment Token you minted for challenges[0]. Set it here to pay $0.50 for this single call and receive the full result — no API key, no subscription, no human. One payment covers one call.",
+  "type": "string"
+}

addedInput schema / properties / mpp_pay

Added value: +{
+  "description": "Autonomous payment (Stripe MPP), step 1: set true to receive a signed $0.50 payment challenge for this call instead of the free preview. No money moves — a challenge is a price quote. Humans never set this, so it does not affect the normal free/trial funnel.",
+  "type": "boolean"
+}

Changed5 schema fields changedAug 11, 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 changedJul 21, 2026

addedOutput schema / properties / _front_door

Added value: +{
+  "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"
+}

Changed5 schema fields changedJul 18, 2026

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

addedOutput schema / properties / site_evaluation_handoff / anyOf

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

changedOutput schema / properties / site_evaluation_handoff / description

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

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

Changed1 schema field changedJul 17, 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"
+    },
+    "_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": {
+      "additionalProperties": {},
+      "description": "Pre-built follow-up call (analyze_site / get_water_risk args) when the payload carries coordinates.",
+      "properties": {},
+      "type": "object"
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedJul 3, 2026

changedInput schema / properties / region_id / description

Previous value: -"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE) or an EIA balancing-authority code, e.g. SOCO, DUK, AZPS, TVA"New value: +"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE), an EIA balancing-authority code (e.g. SOCO, DUK, AZPS, TVA), or the PJM Dominion zone region_id=\"PJM-DOM\" for live Ashburn / Northern Virginia zone load + real-time LMP (the world's #1 DC market, invisible in EIA)"

Changed3 schema fields changedJul 2, 2026

addedInput schema / properties / iso / description

Added value: +"Alias for region_id — the ISO/RTO or balancing-authority code"

addedInput schema / properties / region / description

Added value: +"Alias for region_id — the ISO/RTO or balancing-authority code"

addedInput schema / properties / region_id / description

Added value: +"Grid region (required): one of the 7 US ISOs (PJM, ERCOT, CAISO, MISO, SPP, NYISO, ISO-NE) or an EIA balancing-authority code, e.g. SOCO, DUK, AZPS, TVA"

Changed2 schema fields changedJun 2, 2026
- addedInput schema / properties / iso
```
Added value: +{
+  "type": "string"
+}
```
- addedInput schema / properties / region
```
Added value: +{
+  "type": "string"
+}
```

Changed5 schema fields changedApr 29, 2026

addedInput schema / $schema

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

removedInput schema / properties / region_id / default
```
Removed value: -""
```
removedInput schema / properties / region_id / title
```
Removed value: -"Region Id"
```

removedInput schema / title

Removed value: -"get_grid_intelligenceArguments"

changedOutput schema / (root)

Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "get_grid_intelligenceOutput",
-  "type": "object"
-}New value: +null

Changed1 schema field changedApr 18, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "result": {
+      "title": "Result",
+      "type": "string"
+    }
+  },
+  "required": [
+    "result"
+  ],
+  "title": "get_grid_intelligenceOutput",
+  "type": "object"
+}

Changed1 schema field changedApr 11, 2026

changedOutput schema / (root)

Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "get_grid_intelligenceOutput",
-  "type": "object"
-}New value: +null

Changed1 schema field changedMar 31, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "result": {
+      "title": "Result",
+      "type": "string"
+    }
+  },
+  "required": [
+    "result"
+  ],
+  "title": "get_grid_intelligenceOutput",
+  "type": "object"
+}

Changed1 schema field changedMar 26, 2026

changedOutput schema / (root)

Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "get_grid_intelligenceOutput",
-  "type": "object"
-}New value: +null

AddedMar 23, 2026

TDQS

A4.2/5.0

Behavior5/5

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

Annotations cover only the safety profile (read-only, idempotent), and the description adds what they cannot: response throttling by key tier, that keyless calls return a preview rather than the full brief, that non-US-ISO codes yield region_not_covered, and that avg_time_to_power_months and avg_queue_wait_months are distinct measurements that must not be conflated. That output-field disambiguation is unusually valuable and prevents a real reporting error.

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?

Front-loaded correctly: trigger condition first, payload list second, caveats and example last. However, it is denser than needed — the seven-ISO enumeration appears twice and the free-preview behavior is stated three times ("keyless gets a trimmed preview", "With a free key...", "Free = preview"), which crowds a description that could be a third shorter.

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?

With an output schema present, the description need not explain return values, and it correctly spends its budget on auth tiers, error behavior, and field-meaning traps instead. It is essentially complete for invocation. The missing piece is how the four alternative identifying parameters in the anyOf are resolved if more than one is supplied.

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

Parameters4/5

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

Schema coverage is 100%, so the baseline is 3; the description earns an extra point by adding value constraints the schema does not enforce — iso must be one of the seven US ISOs, and other codes return region_not_covered rather than an error or a guess. It also restates the region/iso aliasing, which is redundant with the schema. It does not clarify precedence among the anyOf alternatives (region_id vs iso vs market), which is the one remaining semantic gap.

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

Purpose4/5

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

Names a specific domain (grid capacity, power availability, headroom, time-to-power) and enumerates the return payload — live demand, fuel mix, queue depth, DCPI scores, reserve margin. An agent knows exactly what class of question this answers. It stops short of naming a sibling, which matters here given near-neighbors like get_iso_context, get_grid_data, get_grid_scoreboard, and get_power_availability_timeline.

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

Usage Guidelines4/5

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

"Use this when the user asks about grid capacity, power availability, headroom or time-to-power..." is an explicit trigger condition, and the worked example ("PJM headroom for 200 MW?") anchors it. Auth-tier guidance (free key = a few briefs/day, keyless = trimmed preview, unlimited = paid) tells the agent whether it can call at all. No explicit when-not or named alternative is given, so it is short of a 5.

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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