DC Hub — Data Center & Energy Intelligence

Get Fiber Readiness

get_fiber_readiness

Read-onlyIdempotent

Check fiber-readiness for one parcel or site by coordinates: get near-net distance, reachable carrier count, and single-carrier risk to guide site selection.

Instructions

Use when you need the FIBER-READINESS / connectivity verdict for ONE parcel or site (lat/lon): near-net distance to a carrier-served facility, how many distinct fiber carriers are reachable, and whether there is single-carrier risk (no path diversity). This is the parcel connectivity answer engineering site-selectors screen on. Example: "Is this Loudoun County parcel fiber-ready and how many carriers can serve it?" — get_fiber_readiness lat=39.04 lon=-77.48 radius_km=50. Params: lat (-90..90, required), lon (-180..180, required), radius_km (search radius in km, default 50, range 5-200). Returns: {score 0-100 (null when not scored — see carrier_data_coverage), near_net_bucket ("on-net"|"near-net"|"acceptable"|"build-required"|"unknown"), nearest_carrier_km, carrier_count, top_carriers:[{carrier, distance_km}], single_carrier_risk (bool, null when not scored), fiber_coverage_km, verdict_short, carrier_data_coverage ("confirmed"|"none_in_region")}. IMPORTANT — "unknown" is NOT "bad": carrier presence comes from PeeringDB, which is global but thin outside dense US/EU metros, so DC Hub distinguishes "no carrier serves this point" from "PeeringDB does not describe this region". When carrier_data_coverage is "none_in_region" the bucket is "unknown", score/single_carrier_risk are null, and NOTHING about the site fiber has been measured — do not report it as greenfield, unserved, or a build-required site. Only carrier_data_coverage "confirmed" with carrier_count 0 means a fiber build is genuinely required. Do NOT use to map carrier ROUTES between metros (use get_fiber_intel) or for a full multi-factor site suitability score (use analyze_site).

Input Schema

TableJSON Schema

Name	Required	Description
`lat`	No	Site latitude in decimal degrees (-90 to 90, required), e.g. 39.04
`lng`	No	Alias for lon — either name works
`lon`	No	Site longitude in decimal degrees (-180 to 180, required), e.g. -77.48
`latitude`	No	Alias for lat — either name works
`longitude`	No	Alias for lon — either name works
`radius_km`	No	Search radius in km for reachable fiber carriers (default 50, range 5-200)

Output Schema

TableJSON Schema

Name	Required	Description
`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.
`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.
`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 changedAug 30, 2026

removedInput schema / $schema

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

removedOutput schema / $schema

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

Changed5 schema fields changedv2.3.20Aug 14, 2026

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

addedOutput schema / properties / citation / anyOf

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

changedOutput schema / properties / citation / description

Previous value: -"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload."New value: +"Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload. Normally an OBJECT {source, url, license, cite_as, retrieved_at}; a bare string is accepted and carries the attribution line itself."

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

Changed4 schema fields changedv2.3.12Jul 28, 2026

addedInput schema / properties / latitude

Added value: +{
+  "description": "Alias for lat — either name works",
+  "type": "number"
+}

addedInput schema / properties / lng

Added value: +{
+  "description": "Alias for lon — either name works",
+  "type": "number"
+}

addedInput schema / properties / longitude

Added value: +{
+  "description": "Alias for lon — either name works",
+  "type": "number"
+}

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": {},
+  "description": "DC Hub envelope: structuredContent mirrors the JSON payload in content[0].text — tool-specific data fields ride at the top level alongside these envelope keys.",
+  "properties": {
+    "_entity": {
+      "description": "Payload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest.",
+      "type": "string"
+    },
+    "_front_door": {
+      "additionalProperties": {},
+      "description": "In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan.",
+      "properties": {},
+      "type": "object"
+    },
+    "_return_loop": {
+      "additionalProperties": {},
+      "description": "Suggested next-session delta call (get_changes since=24h) so you pull only what changed.",
+      "properties": {},
+      "type": "object"
+    },
+    "citation": {
+      "additionalProperties": {},
+      "description": "Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload.",
+      "properties": {},
+      "type": "object"
+    },
+    "provenance": {
+      "additionalProperties": {},
+      "description": "Collection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing.",
+      "properties": {},
+      "type": "object"
+    },
+    "quota": {
+      "additionalProperties": {},
+      "description": "Caller quota state (remaining calls, tier) when available.",
+      "properties": {},
+      "type": "object"
+    },
+    "site_evaluation_handoff": {
+      "anyOf": [
+        {
+          "items": {
+            "additionalProperties": {},
+            "properties": {},
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        }
+      ],
+      "description": "Pre-built follow-up calls (analyze_site / get_water_risk args) when the payload carries coordinates — an array of {tool, parameters, why} entries."
+    }
+  },
+  "type": "object"
+}

Changed3 schema fields changedv2.3.6Jul 2, 2026

addedInput schema / properties / lat / description

Added value: +"Site latitude in decimal degrees (-90 to 90, required), e.g. 39.04"

addedInput schema / properties / lon / description

Added value: +"Site longitude in decimal degrees (-180 to 180, required), e.g. -77.48"

addedInput schema / properties / radius_km / description

Added value: +"Search radius in km for reachable fiber carriers (default 50, range 5-200)"

Addedv2.2.8Jun 17, 2026

TDQS

A4.9/5.0

Behavior5/5

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

Despite annotations already carrying readOnlyHint and idempotentHint, the description adds critical behavioral context: the PeeringDB data source, the semantic distinction between 'unknown' and 'build-required', null behavior for score/single_carrier_risk, and a warning not to treat 'none_in_region' as unserved. This goes well beyond the annotations and prevents a likely misinterpretation.

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

Conciseness5/5

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

The definition is long but every sentence earns its place: use-case, example, parameter summary, return shape, and a critical caveat on interpreting 'unknown'. The warning is front-loaded toward the end after the necessary context, and the structure separates the core purpose from the interpretive nuance.

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 tool with complex null semantics and a coverage distinction, the description covers input usage, output fields, enums, null rules, and alternatives. The existing output schema handles raw return shapes, and the description supplies the missing interpretation layer—especially the 'unknown is not bad' rule—making it effectively complete for agent invocation.

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%, and the schema already documents each parameter, so the baseline is 3. The description adds value by explicitly declaring lat/lon as required (the schema has no required list), giving a full example invocation, and restating radius default/range in human terms, which reinforces but does not radically extend the schema.

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 opens with a specific verb-resource pair: get the FIBER-READINESS / connectivity verdict for ONE parcel or site, and enumerates the core outputs (near-net distance, carrier count, single-carrier risk). It explicitly distinguishes itself from get_fiber_intel (routes between metros) and analyze_site (multi-factor suitability), so an agent can select it correctly without opening the schemas.

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?

It provides a clear 'Use when' trigger—needing the parcel connectivity verdict for a single lat/lon site—and an explicit 'Do NOT use' clause naming get_fiber_intel for metro route mapping and analyze_site for full suitability scoring. Example usage and parameter guidance reinforce the selection criteria.

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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