DC Hub

Energy Prices

get_energy_prices

Read-onlyIdempotent

Use this when the user asks what electricity or natural gas costs for a data center in a US ISO or state ("what does power cost in ERCOT?", "retail rate in Virginia?"); price alone does not rank sites (the cheapest ISO may have no headroom; execute_plan weighs both). Returns EIA RETAIL electricity rates, which are monthly and not live (about 3 months behind; retail_rates.latest_period names the month), for one ISO footprint (the average of its states), one state, or the US: retail_rates {avg_cents_kwh, min_cents_kwh, max_cents_kwh, latest_period, states_covered} in CENTS/kWh, plus avg_rate_kwh, retail_rate_kwh and industrial_rate_kwh in DOLLARS/kWh (by_sector when no sector is given); and natural_gas_usd_mmbtu, the latest Henry Hub daily spot in $/MMBtu, one national benchmark rather than a state or ISO price, with its own natural_gas.period and as_of. Example: "What is the retail power price and gas price in ERCOT?" — get_energy_prices iso=ERCOT. Params: iso (ERCOT, PJM, MISO, CAISO, SPP, NYISO, ISONE) or state (e.g. TX); data_type is accepted but does not change the response. At an anonymous or free-key seat the figures come back null with gated: true; an email-bound key opens them. This tool has no wholesale/LMP price and no grid-status flag.

Input Schema

Name	Required	Description
`iso`	No	ISO/RTO grid region (required for ISO pricing): ERCOT, PJM, MISO, CAISO, SPP, NYISO, ISONE
`state`	No	US state abbreviation for state-level pricing context, e.g. TX
`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.
`data_type`	No	Optional price type focus, e.g. retail, wholesale, gas
`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
`as_of`	No
`gated`	No
`scope`	No
`filter`	No
`success`	No
`caller_tier`	No
`natural_gas`	No
`avg_rate_kwh`	No
`retail_rates`	No
`retail_rate_kwh`	No
`industrial_rate_kwh`	No
`natural_gas_usd_mmbtu`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 25, 2026
- removedOutput schema / properties / grid_status
```
Removed value: -{}
```
- addedOutput schema / properties / natural_gas
```
Added value: +{}
```
- removedOutput schema / properties / wholesale_price_usd_mwh
```
Removed value: -{}
```

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: -{}
```

Changed45 schema fields changedOct 18, 2026

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

removedOutput schema / description

Removed value: -"Live energy pricing for one US ISO: retail cents/kWh + wholesale + natural gas context — alongside the DC Hub envelope keys."

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: -"Pricing as-of timestamp"
```

removedOutput schema / properties / avg_rate_kwh / anyOf

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

removedOutput schema / properties / avg_rate_kwh / description
```
Removed value: -"Average rate, cents/kWh"
```

removedOutput schema / properties / caller_tier / anyOf

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

removedOutput schema / properties / caller_tier / description
```
Removed value: -"Tier the response was served at"
```

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 / filter / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "iso": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "ISO filter echoed back"
-      },
-      "sector": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Sector the rate covers"
-      },
-      "state": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "State filter echoed back"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / filter / description
```
Removed value: -"Echo of the applied filters"
```

removedOutput schema / properties / gated / anyOf

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

removedOutput schema / properties / gated / description

Removed value: -"true when parts of the payload were withheld by tier"

removedOutput schema / properties / grid_status / anyOf

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

removedOutput schema / properties / grid_status / description

Removed value: -"Real-time grid status flag (when served)"

removedOutput schema / properties / industrial_rate_kwh / anyOf

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

removedOutput schema / properties / industrial_rate_kwh / description
```
Removed value: -"Industrial electricity rate, cents/kWh"
```

removedOutput schema / properties / natural_gas_usd_mmbtu / anyOf

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

removedOutput schema / properties / natural_gas_usd_mmbtu / description

Removed value: -"Henry Hub-referenced natural gas price, USD/MMBtu (when served)"

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 / retail_rate_kwh / anyOf

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

removedOutput schema / properties / retail_rate_kwh / description
```
Removed value: -"Retail electricity rate, cents/kWh"
```

removedOutput schema / properties / retail_rates / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "avg_cents_kwh": {
-        "anyOf": [
-          {
-            "anyOf": [
-              {
-                "type": "number"
-              },
-              {
-                "type": "string"
-              }
-            ]
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Average retail, cents/kWh"
-      },
-      "latest_period": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "EIA period the rates come from"
-      },
-      "max_cents_kwh": {
-        "anyOf": [
-          {
-            "anyOf": [
-              {
-                "type": "number"
-              },
-              {
-                "type": "string"
-              }
-            ]
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Maximum, cents/kWh"
-      },
-      "min_cents_kwh": {
-        "anyOf": [
-          {
-            "anyOf": [
-              {
-                "type": "number"
-              },
-              {
-                "type": "string"
-              }
-            ]
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Minimum, cents/kWh"
-      },
-      "states_covered": {
-        "anyOf": [
-          {
-            "anyOf": [
-              {
-                "type": "number"
-              },
-              {
-                "type": "string"
-              }
-            ]
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "States in the aggregate"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]

removedOutput schema / properties / retail_rates / description
```
Removed value: -"Retail-rate aggregate block"
```

removedOutput schema / properties / scope / anyOf

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

removedOutput schema / properties / scope / description

Removed value: -"What the figures cover (e.g. the ISO/state scope line)"

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 / success / anyOf

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

removedOutput schema / properties / success / description

Removed value: -"true when the pricing lookup succeeded"

removedOutput schema / properties / wholesale_price_usd_mwh / anyOf

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

removedOutput schema / properties / wholesale_price_usd_mwh / description
```
Removed value: -"Wholesale / LMP context, USD/MWh (when served)"
```

AddedOct 9, 2026
RemovedSep 29, 2026

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."

Changed2 schema fields changedSep 8, 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"
+}

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#"

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"
+}

Changed19 schema fields changedJul 18, 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: +"Live energy pricing for one US ISO: retail cents/kWh + wholesale + natural gas context — alongside the DC Hub envelope keys."

addedOutput schema / properties / as_of

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Pricing as-of timestamp"
+}

addedOutput schema / properties / avg_rate_kwh

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Average rate, cents/kWh"
+}

addedOutput schema / properties / caller_tier

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Tier the response was served at"
+}

addedOutput schema / properties / filter

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "iso": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "ISO filter echoed back"
+        },
+        "sector": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Sector the rate covers"
+        },
+        "state": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "State filter echoed back"
+        }
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Echo of the applied filters"
+}

addedOutput schema / properties / gated

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "true when parts of the payload were withheld by tier"
+}

addedOutput schema / properties / grid_status

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Real-time grid status flag (when served)"
+}

addedOutput schema / properties / industrial_rate_kwh

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Industrial electricity rate, cents/kWh"
+}

addedOutput schema / properties / natural_gas_usd_mmbtu

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Henry Hub-referenced natural gas price, USD/MMBtu (when served)"
+}

addedOutput schema / properties / retail_rate_kwh

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Retail electricity rate, cents/kWh"
+}

addedOutput schema / properties / retail_rates

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "avg_cents_kwh": {
+          "anyOf": [
+            {
+              "anyOf": [
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Average retail, cents/kWh"
+        },
+        "latest_period": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "EIA period the rates come from"
+        },
+        "max_cents_kwh": {
+          "anyOf": [
+            {
+              "anyOf": [
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Maximum, cents/kWh"
+        },
+        "min_cents_kwh": {
+          "anyOf": [
+            {
+              "anyOf": [
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Minimum, cents/kWh"
+        },
+        "states_covered": {
+          "anyOf": [
+            {
+              "anyOf": [
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "States in the aggregate"
+        }
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Retail-rate aggregate block"
+}

addedOutput schema / properties / scope

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "What the figures cover (e.g. the ISO/state scope line)"
+}

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"
```

addedOutput schema / properties / success

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "true when the pricing lookup succeeded"
+}

addedOutput schema / properties / wholesale_price_usd_mwh

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Wholesale / LMP context, USD/MWh (when served)"
+}

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"
+}

Changed3 schema fields changedJul 2, 2026

addedInput schema / properties / data_type / description

Added value: +"Optional price type focus, e.g. retail, wholesale, gas"

addedInput schema / properties / iso / description

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

addedInput schema / properties / state / description

Added value: +"US state abbreviation for state-level pricing context, e.g. TX"

Changed9 schema fields changedApr 29, 2026

addedInput schema / $schema

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

removedInput schema / properties / data_type / default
```
Removed value: -"retail_rates"
```
removedInput schema / properties / data_type / title
```
Removed value: -"Data Type"
```
removedInput schema / properties / iso / default
```
Removed value: -""
```
removedInput schema / properties / iso / title
```
Removed value: -"Iso"
```
removedInput schema / properties / state / default
```
Removed value: -""
```
removedInput schema / properties / state / title
```
Removed value: -"State"
```

removedInput schema / title

Removed value: -"get_energy_pricesArguments"

changedOutput schema / (root)

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

Changed1 schema field changedApr 11, 2026

changedOutput schema / (root)

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

Changed1 schema field changedMar 26, 2026

changedOutput schema / (root)

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

AddedMar 15, 2026

TDQS

A4.3/5.0

Behavior3/5

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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive), and the description usefully adds provenance and freshness (EIA retail, monthly, ~3 months lag, latest_period field names the month), the national-benchmark nature of Henry Hub gas, and auth behavior (anonymous/free-key seats return null with gated: true; email-bound key unlocks). These are real additions beyond the annotations. However, it omits the payment flow entirely (mpp_pay/mpp_credential appear only in the schema), so the description does not fully disclose the per-call charge behavior a caller must understand.

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

Conciseness3/5

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

Content is front-loaded with the when-to-use trigger, which is the right priority, and most sentences carry information. But it is a single dense paragraph of roughly 250 words, and a large block enumerates return fields (retail_rates, avg_rate_kwh, industrial_rate_kwh, natural_gas_usd_mmbtu) that the existing output schema already documents — that portion does not fully earn its place.

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 a multi-source, gated, stale-by-design data tool, the description covers what is returned, units (cents vs dollars per kWh), freshness, the national-vs-regional distinction for gas, failure mode at unauthenticated seats, and explicit scope limits (no wholesale/LMP, no grid status). With an output schema present, return-value shape needn't be explained further; nothing an agent needs in order to call this correctly is missing.

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 baseline is 3, but the description adds genuine meaning: it enumerates the ISO values, gives a state example, and establishes that iso/state select exactly one scope (one ISO footprint as the average of its states, one state, or the US). It also clarifies that data_type 'is accepted but does not change the response', which resolves ambiguity in the schema's 'Optional price type focus' wording — though that is arguably a schema/description mismatch rather than pure enrichment.

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?

States a specific verb+resource (retrieves electricity/natural gas prices) with explicit scope (US ISO footprint, single state, or US), and actively distinguishes itself from siblings by naming execute_plan and by disclaiming wholesale/LMP and grid-status data. An agent can identify it without opening the 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?

Gives concrete trigger phrasings ('what does power cost in ERCOT?', 'retail rate in Virginia?') plus an explicit exclusion ('price alone does not rank sites ... execute_plan weighs both'), and states the alternative's selection condition. It also flags the gated-seat case so the agent knows when results will be null.

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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