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FreightUtils MCP Server

by io.github.SoapyRED
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Airport Code Lookup

airport_lookup
Read-onlyIdempotent

Look up an airport by IATA code (3 letters, e.g. "LHR"), ICAO code (4 chars, e.g. "EGLL"), or free-text name/city search (e.g. "heathrow"). Covers 86,248 airports worldwide (OurAirports, public domain, cross-checked vs OpenFlights + Wikidata).

Provide ONE of iata, icao, or query; the optional type filter narrows results. Behavior: read-only; exact code hits return one record; ambiguous name searches return ranked candidates (exact codes first, then larger airports) with match quality reported via the envelope's confidence (basis match_quality); an unknown code errors with a not-found message. Rate-limited: a limit error carries reset_at, the UTC time the allowance resets.

Returns: count and results[] — per airport: IATA + ICAO/ident, name, type (large/medium/small/heliport/closed/seaplane), municipality, region, country, latitude/longitude and elevation_ft — under result, plus confidence, _source and citation (the FreightUtils v1 response envelope).

Limitations: reference data only — not for navigation; verify operationally critical codes with IATA / ICAO.

Related: nearest_airport (find airports FROM a coordinate), airline_lookup (searches CARRIERS / AWB prefixes, not airports), unlocode_lookup (general transport locations, of which airports are one function).

Identifiers: Each record carries fu_id, a stable FreightUtils identifier (and fu_version_id where the dataset has editions); resolve_reference resolves one to exactly its record.

Input Schema

NameRequiredDescriptionDefault
iataNoExact IATA code (3 letters)
icaoNoExact ICAO / ident (4 chars)
typeNoOptional filter by airport type
codesNoBatch: up to 50 airport codes — 3 letters IATA, 4 characters ICAO — answered as results[] in input order, each with its own status. Send alone.
queryNoName / city / municipality search (2 to 200 chars)

Output Schema

NameRequiredDescriptionDefault
okYes
_metaNo
as_ofNo
resultYes
statusNo
_sourceYes
editionNo
citationYes
validityNo
warningsNo
confidenceYes
missing_inputsNo
blocking_errorsNo
envelope_versionYes
normalized_inputNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • addedOutput schema / properties / _meta / properties / upstream
      Added value: +{
+  "additionalProperties": {},
+  "properties": {
+    "datasets": {
+      "additionalProperties": {
+        "additionalProperties": {},
+        "properties": {
+          "kind": {
+            "anyOf": [
+              {
+                "enum": [
+                  "watched",
+                  "checksum-only",
+                  "manual"
+                ],
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "last_success": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "reason": {
+            "type": "string"
+          },
+          "stale": {
+            "type": "boolean"
+          },
+          "state": {
+            "enum": [
+              "in_step",
+              "changed_upstream",
+              "schema_drift",
+              "unreachable",
+              "window_missed",
+              "unknown"
+            ],
+            "type": "string"
+          },
+          "window_days": {
+            "type": [
+              "number",
+              "null"
+            ]
+          }
+        },
+        "required": [
+          "state",
+          "kind",
+          "last_success",
+          "window_days",
+          "stale"
+        ],
+        "type": "object"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "stale": {
+      "type": "boolean"
+    },
+    "state": {
+      "enum": [
+        "in_step",
+        "changed_upstream",
+        "schema_drift",
+        "unreachable",
+        "window_missed",
+        "unknown"
+      ],
+      "type": "string"
+    },
+    "state_read_at": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "required": [
+    "state",
+    "stale",
+    "state_read_at",
+    "datasets"
+  ],
+  "type": "object"
+}
  2. Changed1 schema field changed
    • addedOutput schema / properties / _meta / properties / ids
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "pattern": {
+      "type": "string"
+    },
+    "scheme": {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    }
+  },
+  "required": [
+    "scheme",
+    "pattern"
+  ],
+  "type": "object"
+}
  3. Changed2 schema fields changed
    • removedOutput schema / properties / _meta / properties / receipt / properties / reason / const
      Removed value: -"key_required"
    • addedOutput schema / properties / _meta / properties / receipt / properties / reason / enum
      Added value: +[
+  "key_required",
+  "quota"
+]
  4. Changed1 schema field changed
    • addedOutput schema / properties / _meta / properties / receipt
      Added value: +{
+  "additionalProperties": {},
+  "properties": {
+    "created_at": {
+      "type": "string"
+    },
+    "dataset_version": {
+      "additionalProperties": {
+        "type": "string"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "engine_version": {
+      "type": "string"
+    },
+    "inputs": {},
+    "reason": {
+      "const": "key_required",
+      "type": "string"
+    },
+    "receipt_hash": {
+      "type": "string"
+    },
+    "result": {
+      "additionalProperties": {},
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "schema_version": {
+      "type": "string"
+    },
+    "stored": {
+      "const": false,
+      "type": "boolean"
+    },
+    "tool": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "stored",
+    "reason",
+    "schema_version",
+    "receipt_hash",
+    "created_at",
+    "tool",
+    "inputs",
+    "dataset_version",
+    "engine_version",
+    "result"
+  ],
+  "type": "object"
+}
  5. Changed1 schema field changed
    • addedOutput schema / properties / _meta / properties / edition_basis
      Added value: +{
+  "type": "string"
+}
  6. Changed1 schema field changed
    • addedInput schema / properties / codes
      Added value: +{
+  "description": "Batch: up to 50 airport codes — 3 letters IATA, 4 characters ICAO — answered as results[] in input order, each with its own status. Send alone.",
+  "items": {
+    "maxLength": 4,
+    "type": "string"
+  },
+  "maxItems": 50,
+  "minItems": 1,
+  "type": "array"
+}
  7. Changed1 schema field changed
    • addedOutput schema / properties / _meta
      Added value: +{
+  "additionalProperties": {},
+  "properties": {
+    "check_id": {
+      "type": "string"
+    },
+    "receipt_url": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}
  8. Changed5 schema fields changed
    • addedOutput schema / properties / as_of
      Added value: +{
+  "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
+  "type": "string"
+}
    • addedOutput schema / properties / edition
      Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "applies_from": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "may_apply_until": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "name": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "name",
+        "applies_from",
+        "may_apply_until"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}
    • changedOutput schema / properties / envelope_version / enum
      Previous value: -[
-  "1",
-  "1.1"
-]New value: +[
+  "1",
+  "1.1",
+  "1.2"
+]
    • addedOutput schema / properties / missing_inputs
      Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}
    • addedOutput schema / properties / status
      Added value: +{
+  "enum": [
+    "ok",
+    "partial",
+    "not_found",
+    "unsupported",
+    "ambiguous"
+  ],
+  "type": "string"
+}
  9. Changed2 schema fields changed
    • changedInput schema / properties / query / description
      Previous value: -"Name / city / municipality search (min 2 chars)"New value: +"Name / city / municipality search (2 to 200 chars)"
    • addedInput schema / properties / query / maxLength
      Added value: +200
  10. Changed2 schema fields changed
    • removedOutput schema / properties / validity / properties / effective_to / anyOf
      Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
    • addedOutput schema / properties / validity / properties / effective_to / type
      Added value: +[
+  "string",
+  "null"
+]
  11. Changed1 schema field changed
    • addedInput schema / additionalProperties
      Added value: +false
  12. Changed5 schema fields changed
    • addedOutput schema / properties / _source / properties / authority_current_edition
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / properties / _source / properties / checked_at
      Added value: +{
+  "type": "string"
+}
    • addedOutput schema / properties / _source / properties / dataset_edition
      Added value: +{
+  "type": "string"
+}
    • removedOutput schema / properties / envelope_version / const
      Removed value: -"1"
    • addedOutput schema / properties / envelope_version / enum
      Added value: +[
+  "1",
+  "1.1"
+]
  13. Changed18 schema fields changed
    • changedOutput schema / properties / _source / additionalProperties
      Previous value: -{
-  "type": "string"
-}New value: +false
    • removedOutput schema / properties / _source / description
      Removed value: -"Provenance envelope (OurAirports, cross-checked)"
    • addedOutput schema / properties / _source / properties
      Added value: +{
+  "checked": {
+    "type": "string"
+  },
+  "name": {
+    "type": "string"
+  },
+  "provenance_status": {
+    "enum": [
+      "verified",
+      "pending-verification",
+      "computed",
+      "live"
+    ],
+    "type": "string"
+  },
+  "source_url": {
+    "type": "string"
+  }
+}
    • removedOutput schema / properties / _source / propertyNames
      Removed value: -{
-  "type": "string"
-}
    • addedOutput schema / properties / _source / required
      Added value: +[
+  "name",
+  "checked",
+  "provenance_status"
+]
    • addedOutput schema / properties / blocking_errors
      Added value: +{
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "recovery": {
+        "additionalProperties": false,
+        "properties": {
+          "action": {
+            "type": "string"
+          },
+          "params": {
+            "additionalProperties": {},
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          },
+          "tool": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "action"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "code",
+      "message",
+      "recovery"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}
    • addedOutput schema / properties / citation
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "qualifier": {
+      "type": "string"
+    },
+    "text": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "text"
+  ],
+  "type": "object"
+}
    • addedOutput schema / properties / confidence
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "basis": {
+      "enum": [
+        "deterministic",
+        "provenance",
+        "match_quality",
+        "freshness"
+      ],
+      "type": "string"
+    },
+    "level": {
+      "enum": [
+        "high",
+        "medium",
+        "low"
+      ],
+      "type": "string"
+    },
+    "score": {
+      "maximum": 1,
+      "minimum": 0,
+      "type": "number"
+    }
+  },
+  "required": [
+    "level",
+    "basis"
+  ],
+  "type": "object"
+}
    • removedOutput schema / properties / count
      Removed value: -{
-  "type": "number"
-}
    • removedOutput schema / properties / disclaimer
      Removed value: -{
-  "type": "string"
-}
    • addedOutput schema / properties / envelope_version
      Added value: +{
+  "const": "1",
+  "type": "string"
+}
    • addedOutput schema / properties / normalized_input
      Added value: +{
+  "additionalProperties": {},
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}
    • addedOutput schema / properties / ok
      Added value: +{
+  "type": "boolean"
+}
    • addedOutput schema / properties / result
      Added value: +{
+  "additionalProperties": {},
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}
    • removedOutput schema / properties / results
      Removed value: -{
-  "description": "Matching airports (single exact match for iata/icao; ranked candidates for name search)",
-  "items": {
-    "additionalProperties": false,
-    "properties": {
-      "country": {
-        "description": "ISO 3166-1 alpha-2 country code",
-        "type": "string"
-      },
-      "country_name": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "elevation_ft": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "iata_code": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "IATA 3-letter code (null if none)"
-      },
-      "ident": {
-        "description": "ICAO / OurAirports ident",
-        "type": "string"
-      },
-      "latitude": {
-        "type": "number"
-      },
-      "longitude": {
-        "type": "number"
-      },
-      "municipality": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "name": {
-        "type": "string"
-      },
-      "region": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "Region / subdivision (readable)"
-      },
-      "type": {
-        "description": "large_airport | medium_airport | small_airport | heliport | closed | seaplane_base",
-        "type": "string"
-      }
-    },
-    "required": [
-      "ident",
-      "iata_code",
-      "name",
-      "type",
-      "municipality",
-      "region",
-      "country",
-      "country_name",
-      "latitude",
-      "longitude",
-      "elevation_ft"
-    ],
-    "type": "object"
-  },
-  "type": "array"
-}
    • addedOutput schema / properties / validity
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "as_of": {
+      "type": "string"
+    },
+    "effective_from": {
+      "type": "string"
+    },
+    "effective_to": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "required": [
+    "as_of"
+  ],
+  "type": "object"
+}
    • addedOutput schema / properties / warnings
      Added value: +{
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "propertyNames": {
+          "type": "string"
+        },
+        "type": "object"
+      },
+      "message": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "code",
+      "message"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}
    • changedOutput schema / required
      Previous value: -[
-  "count",
-  "results",
-  "disclaimer",
-  "_source"
-]New value: +[
+  "envelope_version",
+  "ok",
+  "result",
+  "confidence",
+  "_source",
+  "citation"
+]
  14. Added

TDQS

A3.9/5.0
Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered upstream; the description still adds real value with ranked-candidate ordering, confidence/match_quality reporting, and not-found vs rate-limit error behavior including reset_at. It stops short of describing result ordering guarantees for the batch path or how partial failures are surfaced beyond 'each with its own status' in the schema.

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

Conciseness4/5

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

Front-loaded with the identifier forms and then cleanly partitioned into Behavior, Returns, Limitations, Related, and Identifiers sections, so an agent can skim. It is longer than strictly necessary, and the Returns/Identifiers material partly duplicates what the output schema and resolve_reference already imply.

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?

An output schema exists, yet the definition still summarizes the envelope shape, source attribution, and data provenance, plus a sensible 'not for navigation' limitation and rate-limit reset semantics. The one substantive hole is the batch `codes` workflow: with five parameters and an explicit 'Send alone' constraint, leaving it out of the narrative is a real completeness gap.

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 coverage is 100%, so the baseline is 3 and the schema already documents formats and the type enum. The description adds useful semantics for query ambiguity (ranked candidates, exact codes first, then larger airports) and for the type filter narrowing results, but it silently omits the `codes` batch parameter, which is the one parameter whose exclusivity rule ('Send alone') an agent could easily violate.

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 the exact verb and resource (look up an airport) and enumerates the three accepted identifier forms with concrete examples. It explicitly separates itself from the most confusable siblings, noting that nearest_airport finds airports FROM a coordinate and that airline_lookup searches carriers rather than airports.

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?

Explicitly says to provide ONE of iata, icao, or query, and lists three related tools with the condition that selects each, which is strong routing guidance. However it never mentions the batch `codes` parameter, so an agent reading only the description would not know a multi-code lookup mode exists at all.

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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