DC Hub — Data Center Site Selection & Colocation: Electricity, Power Grid, Gas, Fiber

Search Facilities

search_facilities

Read-onlyIdempotent

FRONT DOOR CHECK — if the ask is "find MW in " or otherwise wants power / fiber / water / verdict context ATTACHED to the hits, call execute_plan(intent="<the user's question, unchanged>") instead of hand-chaining this with three more tools. If the ask is a plain inventory lookup — which facilities match these filters — search_facilities IS the right call and costs one round trip; the planner would add steps and latency for nothing. Search 24,600+ global data center facilities across 170+ countries — by location (country/state/market), capacity (MW), operator, fiber connectivity, status (operational/under-construction/planned), or DCPI verdict. Returns name, provider, lat/lon, power_mw, fiber count, market_slug, status. Answers "which data centers are in Virginia", "who has capacity in this country". Try: search_facilities country=US state=VA min_capacity_mw=10. Note: status is RETURNED but is not a filter — there is no status or min_mw parameter; to filter by construction stage use get_pipeline. Use this to find EXISTING facilities; do NOT use for the forward-looking construction pipeline (use get_pipeline) or for the full profile of one facility (use get_facility).

Input Schema

TableJSON Schema

Name	Required	Description
`city`	No	City name to filter facilities, e.g. Ashburn, Dallas
`tier`	No	Uptime Institute tier filter (1-4)
`limit`	No	Max results to return (1-500; default varies by tool)
`query`	No	Free-text search over facility name/operator/location (mapped to the backend `q` param), e.g. "hyperscale Ashburn"
`state`	No	US state abbreviation or region, e.g. VA, TX
`offset`	No	Pagination offset, 0-based (skip this many results)
`country`	No	ISO 3166-1 alpha-2 country code, e.g. US, GB, SG
`mpp_pay`	No	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.
`operator`	No	Operator/provider company name, e.g. Equinix, Digital Realty
`mpp_credential`	No	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.
`max_capacity_mw`	No	Maximum power capacity filter in megawatts (MW)
`min_capacity_mw`	No	Minimum power capacity filter in megawatts (MW)

Output Schema

TableJSON Schema

Name	Required	Description
`data`	No	Facility rows matching the filters
`note`	No	Serving note (e.g. how many rows the full tier returns)
`tier`	No	Tier the response was served at
`count`	No	Rows returned in THIS response (null on some gated tiers)
`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.
`success`	No	true when the search executed
`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.
`total_matching`	No	Total rows matching the filter across the dataset (null when withheld by tier)
`full_results_available`	No	false when the row set was trimmed for your tier
`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.

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"
+}

Changed13 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: +"Facility search results: `data` rows (name, provider, location, capacity on fuller tiers) alongside the DC Hub envelope keys."

addedOutput schema / properties / count

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Rows returned in THIS response (null on some gated tiers)"
+}

addedOutput schema / properties / data

Added value: +{
+  "anyOf": [
+    {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "city": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "City"
+          },
+          "country": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "ISO-2 country code"
+          },
+          "country_name": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Country full name"
+          },
+          "id": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Facility id"
+          },
+          "lat": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Latitude (fuller tiers)"
+          },
+          "location_display": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Pre-formatted \"City, State, Country\" line"
+          },
+          "lon": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Longitude (fuller tiers)"
+          },
+          "market_slug": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Market slug — feed to get_market_intel / get_market_dcpi_rank (fuller tiers)"
+          },
+          "name": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Facility name"
+          },
+          "power_mw": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Power capacity in MW (fuller tiers)"
+          },
+          "profile_url": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "dchub.cloud facility page"
+          },
+          "provider": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Operator / provider company"
+          },
+          "slug": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "URL slug — feed to get_facility for the full profile"
+          },
+          "state": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "State/region code"
+          },
+          "state_name": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "State/region full name"
+          },
+          "status": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "operational | under-construction | planned (fuller tiers)"
+          },
+          "v": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Per-record verification flag: verified | tracked | published | inferred"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Facility rows matching the filters"
+}

addedOutput schema / properties / full_results_available

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "false when the row set was trimmed for your tier"
+}

addedOutput schema / properties / note

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Serving note (e.g. how many rows the full tier returns)"
+}

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 search executed"
+}

addedOutput schema / properties / tier

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

addedOutput schema / properties / total_matching

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Total rows matching the filter across the dataset (null when withheld by tier)"
+}

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"
+}

Changed16 schema fields changedJul 2, 2026

addedInput schema / properties / city / description

Added value: +"City name to filter facilities, e.g. Ashburn, Dallas"

addedInput schema / properties / country / description

Added value: +"ISO 3166-1 alpha-2 country code, e.g. US, GB, SG"

addedInput schema / properties / limit / description

Added value: +"Max results to return (1-500; default varies by tool)"

changedInput schema / properties / limit / maximum

Previous value: -9007199254740991New value: +500

changedInput schema / properties / limit / minimum

Previous value: --9007199254740991New value: +1

addedInput schema / properties / max_capacity_mw / description

Added value: +"Maximum power capacity filter in megawatts (MW)"

addedInput schema / properties / min_capacity_mw / description

Added value: +"Minimum power capacity filter in megawatts (MW)"

addedInput schema / properties / offset / description

Added value: +"Pagination offset, 0-based (skip this many results)"

changedInput schema / properties / offset / maximum

Previous value: -9007199254740991New value: +100000

changedInput schema / properties / offset / minimum

Previous value: --9007199254740991New value: +0

addedInput schema / properties / operator / description

Added value: +"Operator/provider company name, e.g. Equinix, Digital Realty"

addedInput schema / properties / query / description

Added value: +"Free-text search over facility name/operator/location (mapped to the backend `q` param), e.g. \"hyperscale Ashburn\""

addedInput schema / properties / state / description

Added value: +"US state abbreviation or region, e.g. VA, TX"

addedInput schema / properties / tier / description

Added value: +"Uptime Institute tier filter (1-4)"

changedInput schema / properties / tier / maximum

Previous value: -9007199254740991New value: +4

changedInput schema / properties / tier / minimum

Previous value: --9007199254740991New value: +1

Changed29 schema fields changedApr 29, 2026
- addedInput schema / $schema
```
Added value: +"http://json-schema.org/draft-07/schema#"
```
- removedInput schema / properties / city / default
```
Removed value: -""
```
- removedInput schema / properties / city / title
```
Removed value: -"City"
```
- removedInput schema / properties / country / default
```
Removed value: -""
```
- removedInput schema / properties / country / title
```
Removed value: -"Country"
```
- removedInput schema / properties / limit / default
```
Removed value: -25
```
- addedInput schema / properties / limit / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / limit / minimum
```
Added value: +-9007199254740991
```
- removedInput schema / properties / limit / title
```
Removed value: -"Limit"
```
- removedInput schema / properties / max_capacity_mw / default
```
Removed value: -0
```
- removedInput schema / properties / max_capacity_mw / title
```
Removed value: -"Max Capacity Mw"
```
- removedInput schema / properties / min_capacity_mw / default
```
Removed value: -0
```
- removedInput schema / properties / min_capacity_mw / title
```
Removed value: -"Min Capacity Mw"
```
- removedInput schema / properties / offset / default
```
Removed value: -0
```
- addedInput schema / properties / offset / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / offset / minimum
```
Added value: +-9007199254740991
```
- removedInput schema / properties / offset / title
```
Removed value: -"Offset"
```
- removedInput schema / properties / operator / default
```
Removed value: -""
```
- removedInput schema / properties / operator / title
```
Removed value: -"Operator"
```
- removedInput schema / properties / query / default
```
Removed value: -""
```
- removedInput schema / properties / query / title
```
Removed value: -"Query"
```
- removedInput schema / properties / state / default
```
Removed value: -""
```
- removedInput schema / properties / state / title
```
Removed value: -"State"
```
- removedInput schema / properties / tier / default
```
Removed value: -0
```
- addedInput schema / properties / tier / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / tier / minimum
```
Added value: +-9007199254740991
```
- removedInput schema / properties / tier / title
```
Removed value: -"Tier"
```
- removedInput schema / title
```
Removed value: -"search_facilitiesArguments"
```
- changedOutput schema / (root)
```
Previous value: -{
-  "properties": {
-    "result": {
-      "title": "Result",
-      "type": "string"
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "title": "search_facilitiesOutput",
-  "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": "search_facilitiesOutput",
+  "type": "object"
+}

Changed1 schema field changedApr 11, 2026

changedOutput schema / (root)

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

Changed1 schema field changedMar 26, 2026

changedOutput schema / (root)

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

First observedMar 6, 2026

TDQS

A4.6/5.0

Behavior4/5

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

Annotations already declare readOnlyHint, idempotentHint, and not destructive, so the safety profile is covered. The description adds meaningful behavioral nuance beyond that: status is returned but not filterable, there is no status or min_mw parameter, and the tool is a single round trip versus the heavier planner path. This helps the agent predict behavior without contradicting 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 front-loaded with the critical routing decision, followed by scope, example, and exclusions. Every section earns its place; the only minor excess is promotional phrasing like '24,600+' and '170+ countries,' which is still useful scope information.

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 12-parameter tool with full schema coverage, an output schema, and rich sibling context, the description is complete: it covers routing, filters, return fields, example usage, and explicit exclusions. The agent has everything needed to decide whether to call this tool and how to construct a valid call.

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, but the description adds value beyond the schema with a concrete example call ('country=US state=VA min_capacity_mw=10') and an explicit warning about absent parameters (status, min_mw) to prevent hallucination. This exceeds the schema's plain definitions.

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 states a specific verb and resource: 'Search 24,600+ global data center facilities' by concrete filters, and enumerates return fields. It clearly differentiates from siblings by saying plain inventory lookups are right for search_facilities while execute_plan, get_pipeline, and get_facility handle adjacent cases.

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?

Usage guidance is explicit and actionable: it tells the agent to call execute_plan when context like power/fiber/water/verdict is needed, and to use search_facilities for plain inventory matches. It also names get_pipeline for construction-stage filtering and get_facility for full profiles, covering both when-to-use and when-not-to-use.

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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Input Schema

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Schema Changelog

TDQS

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