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DC Hub Intelligence

Search Facilities

search_facilities
Read-onlyIdempotent

Find existing data centers by country, state, city, operator, capacity (MW), tier, or text query. Returns name, operator, location, market, status, and disclosed MW; free tier lists names/locations.

Instructions

Call when the user wants existing data centers matching filters: country, state, city, operator, MW range, tier or text. Returns name, operator, location, market, status and MW where disclosed; each row is flagged verified or unverified_directory_listing. Free: names and locations; MW and specs need a paid key. Ex: "Equinix sites in Virginia over 10 MW."

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
cityNoCity name to filter facilities, e.g. Ashburn, Dallas
tierNoUptime Institute tier filter (1-4)
limitNoMax results to return (1-500; default varies by tool)
queryNoFree-text search over facility name/operator/location (mapped to the backend `q` param), e.g. "hyperscale Ashburn"
stateNoUS state abbreviation or region, e.g. VA, TX
offsetNoPagination offset, 0-based (skip this many results)
countryNoISO 3166-1 alpha-2 country code, e.g. US, GB, SG
operatorNoOperator/provider company name, e.g. Equinix, Digital Realty
max_capacity_mwNoMaximum power capacity filter in megawatts (MW)
min_capacity_mwNoMinimum power capacity filter in megawatts (MW)

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataNoFacility rows matching the filters
noteNoServing note (e.g. how many rows the full tier returns)
tierNoTier the response was served at
countNoRows returned in THIS response (null on some gated tiers)
quotaNoCaller quota state (remaining calls, tier) when available.
_entityNoPayload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest.
successNotrue when the search executed
citationNoMachine-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.
provenanceNoCollection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing.
_front_doorNoIn-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan.
_return_loopNoSuggested next-session delta call (get_changes since=24h) so you pull only what changed.
total_matchingNoTotal rows matching the filter across the dataset (null when withheld by tier)
full_results_availableNofalse when the row set was trimmed for your tier
site_evaluation_handoffNoPre-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.

  1. Changed2 schema fields changed
    • removedInput schema / $schema
      Removed value: -"http://json-schema.org/draft-07/schema#"
    • removedOutput schema / $schema
      Removed value: -"http://json-schema.org/draft-07/schema#"
  2. Changed5 schema fields changedv2.3.20
    • removedOutput schema / properties / citation / additionalProperties
      Removed value: -{}
    • addedOutput schema / properties / citation / anyOf
      Added value: +[
      +  {
      +    "additionalProperties": {},
      +    "properties": {},
      +    "type": "object"
      +  },
      +  {
      +    "type": "string"
      +  }
      +]
    • changedOutput schema / properties / citation / description
      Previous value: -"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload."New value: +"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload. Normally an OBJECT {source, url, license, cite_as, retrieved_at}; a bare string is accepted and carries the attribution line itself."
    • removedOutput schema / properties / citation / properties
      Removed value: -{}
    • removedOutput schema / properties / citation / type
      Removed value: -"object"
  3. Changed1 schema field changedv2.3.12
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "http://json-schema.org/draft-07/schema#",
      +  "additionalProperties": {},
      +  "description": "Facility search results: `data` rows (name, provider, location, capacity on fuller tiers) alongside the DC Hub envelope keys.",
      +  "properties": {
      +    "_entity": {
      +      "description": "Payload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest.",
      +      "type": "string"
      +    },
      +    "_front_door": {
      +      "additionalProperties": {},
      +      "description": "In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan.",
      +      "properties": {},
      +      "type": "object"
      +    },
      +    "_return_loop": {
      +      "additionalProperties": {},
      +      "description": "Suggested next-session delta call (get_changes since=24h) so you pull only what changed.",
      +      "properties": {},
      +      "type": "object"
      +    },
      +    "citation": {
      +      "additionalProperties": {},
      +      "description": "Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload.",
      +      "properties": {},
      +      "type": "object"
      +    },
      +    "count": {
      +      "anyOf": [
      +        {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "string"
      +            }
      +          ]
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "description": "Rows returned in THIS response (null on some gated tiers)"
      +    },
      +    "data": {
      +      "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"
      +    },
      +    "full_results_available": {
      +      "anyOf": [
      +        {
      +          "type": "boolean"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "description": "false when the row set was trimmed for your tier"
      +    },
      +    "note": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "description": "Serving note (e.g. how many rows the full tier returns)"
      +    },
      +    "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."
      +    },
      +    "success": {
      +      "anyOf": [
      +        {
      +          "type": "boolean"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "description": "true when the search executed"
      +    },
      +    "tier": {
      +      "anyOf": [
      +        {
      +          "type": "string"
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "description": "Tier the response was served at"
      +    },
      +    "total_matching": {
      +      "anyOf": [
      +        {
      +          "anyOf": [
      +            {
      +              "type": "number"
      +            },
      +            {
      +              "type": "string"
      +            }
      +          ]
      +        },
      +        {
      +          "type": "null"
      +        }
      +      ],
      +      "description": "Total rows matching the filter across the dataset (null when withheld by tier)"
      +    }
      +  },
      +  "type": "object"
      +}
  4. Changed16 schema fields changedv2.3.6
    • 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
  5. First observedv2.1.19

TDQS

A3.9/5.0
Behavior4/5

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

Annotations already declare readOnly, idempotent, non-destructive behavior, so the safety profile is covered. The description adds genuinely non-obvious context: the returned field set, the verified vs unverified_directory_listing row flag, and the freemium gating (free names/locations, MW and specs need a paid key). That paywall and data-quality caveat materially affect how an agent should present results.

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?

Three compact sentences with the trigger front-loaded, followed by return shape, gating, and an example. Dense but no wasted clauses; the example earns its place by anchoring filter usage.

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?

For a 10-param optional-filter search with an output schema and full annotation coverage, the description covers trigger, filters, return shape, and monetization limits. It omits pagination guidance (limit/offset semantics) and how it differs from sibling discovery tools, which keeps it short of complete.

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

Parameters3/5

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

Schema description coverage is 100%, so every one of the 10 params is already documented with types and examples. The description restates the filter set (country, state, city, operator, MW range, tier, text) without adding syntax or constraints, so it does little beyond the schema baseline.

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?

States a specific verb and resource ('search existing data centers') plus the filter dimensions supported, so the agent knows exactly what this returns. It does not distinguish itself from close siblings like find_sites or search, leaving the agent to infer which tool to pick, but the purpose itself is unambiguous.

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?

Gives an explicit trigger ('Call when the user wants existing data centers matching filters') and a concrete worked example ('Equinix sites in Virginia over 10 MW'). No when-not guidance or named alternative among the many sibling search tools, so it stops short of full routing guidance.

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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