chathome.lu — Luxembourg Real Estate

Search Properties For Sale

search_for_sale

Read-onlyIdempotent

Search properties for sale in Luxembourg by default; includeCrossBorder opts into commuter-belt inventory by location, price, rooms, area, property type, and positive-evidence amenities, with explicit sort and completeness metadata. Every sourced result identifies and links the original agency listing and states its latest catalogue re-sighting time; thumbnails of the top results are attached as image content blocks.

Input Schema

Name	Required	Description
`sort`	No
`limit`	No
`garden`	No
`locale`	No	Response locale: en, fr, de, lu (Luxembourgish), pt (default: en; 'lb' is a deprecated alias for 'lu')
`balcony`	No
`commune`	No	Supported municipality, city quarter or village name; use resolve_location if ambiguous
`minBeds`	No
`elevator`	No
`maxPrice`	No
`minPrice`	No
`furnished`	No
`maxAreaSqm`	No
`minAreaSqm`	No
`parkingType`	No
`petsAllowed`	No
`minBathrooms`	No
`propertyType`	No
`includePhotos`	No
`maxTotalMonthly`	No	Rental-only confirmed all-in monthly ceiling; missing cost evidence is excluded
`shownListingIds`	No	Already shown listing IDs, accumulated across pages. Excludes those IDs from this live result window; not a stable market snapshot.
`includeCrossBorder`	No	Include supported Grande Région inventory; default false keeps Luxembourg-only compatibility

Output Schema

Name	Required	Description
`note`	No
`total`	Yes	Exact number of listing objects returned in this response; not the number of matches in the market.
`trust`	No
`source`	No
`hasMore`	No
`ranking`	No
`session`	No
`followUp`	No
`listings`	Yes
`countKind`	No
`truncated`	No
`nextCursor`	No
`matchingCount`	No
`returnedCount`	No
`understanding`	No	What the engine understood from the request. notChecked lists wishes no returned home is confirmed to have.
`searchExhaustive`	No
`matchingCountKind`	No
`excludedUnprovenCount`	No	Upstream rows omitted because public facts could not prove every requested hard filter.
`marketMatchingUpperBound`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed81 schema fields changedNov 2, 2026

removedOutput schema / properties / listings / items / properties / agencyName / anyOf

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

addedOutput schema / properties / listings / items / properties / agencyName / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / areaSqm / anyOf

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

addedOutput schema / properties / listings / items / properties / areaSqm / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / availability / properties / availableFrom / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / availability / properties / availableFrom / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / availability / properties / moveInState / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / availability / properties / moveInState / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / baths / anyOf

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

addedOutput schema / properties / listings / items / properties / baths / type
```
Added value: +[
+  "number",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / beds / anyOf

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

addedOutput schema / properties / listings / items / properties / beds / type
```
Added value: +[
+  "number",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / charges / anyOf

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

addedOutput schema / properties / listings / items / properties / charges / type
```
Added value: +[
+  "number",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / city / anyOf

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

addedOutput schema / properties / listings / items / properties / city / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / description / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / description / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / district / anyOf

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

addedOutput schema / properties / listings / items / properties / district / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / energyClass / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / energyClass / type
```
Added value: +[
+  "string",
+  "null"
+]
```

changed

Output schema / properties / listings / items / properties / fieldProvenance / additionalProperties / properties / observedAt / anyOf

Previous value: -[
-  {
-    "format": "date-time",
-    "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "format": "date-time",
+    "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$",
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / listings / items / properties / fieldProvenance / additionalProperties / properties / publisher / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / fieldProvenance / additionalProperties / properties / publisher / type
```
Added value: +[
+  "string",
+  "null"
+]
```

changedOutput schema / properties / listings / items / properties / history / properties / firstObservedAt / anyOf

Previous value: -[
-  {
-    "format": "date-time",
-    "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "format": "date-time",
+    "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$",
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / listings / items / properties / history / properties / lastChangedAt / anyOf

Previous value: -[
-  {
-    "format": "date-time",
-    "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "format": "date-time",
+    "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$",
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / listings / items / properties / history / properties / priceDropTotalEur / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / history / properties / priceDropTotalEur / type
```
Added value: +[
+  "number",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / latitude / anyOf

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

addedOutput schema / properties / listings / items / properties / latitude / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / location / properties / address / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / location / properties / address / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / location / properties / city / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / location / properties / city / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / location / properties / district / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / location / properties / district / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / location / properties / postalCode / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / location / properties / postalCode / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / longitude / anyOf

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

addedOutput schema / properties / listings / items / properties / longitude / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / match / properties / allRequiredConstraintsSatisfied / anyOf
```
Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / match / properties / allRequiredConstraintsSatisfied / type
```
Added value: +[
+  "boolean",
+  "null"
+]
```

removed

Output schema / properties / listings / items / properties / match / properties / requiredConstraints / items / properties / actual / anyOf

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

addedOutput schema / properties / listings / items / properties / match / properties / requiredConstraints / items / properties / actual / type
```
Added value: +[
+  "string",
+  "number",
+  "boolean",
+  "null"
+]
```

removedOutput schema / properties / listings / items / properties / price / anyOf

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

addedOutput schema / properties / listings / items / properties / price / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / pricePerSqm / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / pricePerSqm / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / completionYear / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / completionYear / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / condition / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / condition / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / constructionYear / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / constructionYear / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / floor / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / floor / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / heatingEnergy / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / heatingEnergy / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / heatingType / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / heatingType / type
```
Added value: +[
+  "string",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / landAreaSqm / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / landAreaSqm / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / privateRoomAreaSqm / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / privateRoomAreaSqm / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / rooms / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / rooms / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / property / properties / totalFloors / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / property / properties / totalFloors / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / listings / items / properties / propertyType / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / listings / items / properties / propertyType / type
```
Added value: +[
+  "string",
+  "null"
+]
```

changedOutput schema / properties / listings / items / properties / rent / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "agencyFee": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "agencyFeeBasis": {
-        "anyOf": [
-          {
-            "enum": [
-              "tenant_share",
-              "total_commission",
-              "unknown"
-            ],
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "baseMonthly": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "chargesIncluded": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "chargesMonthly": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "deposit": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "depositExceedsMaximum": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "depositMaximum": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "estimatedMonthlyTotal": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "estimatedMonthlyTotalIsLowerBound": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "estimatedUtilitiesMonthly": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "exactUpfrontCost": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "firstChargeAdvance": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "heatingMayBeDoubleCounted": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "indicativeInsuranceMonthly": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "knownMonthlyLowerBound": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "knownUpfrontCost": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "mandatoryMoveInFeeTotal": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "mandatoryMoveInFees": {
-        "items": {
-          "additionalProperties": {},
-          "properties": {},
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "mandatoryRecurringFeeTotal": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "mandatoryRecurringFees": {
-        "items": {
-          "additionalProperties": {},
-          "properties": {},
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "monthlyTotal": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "monthlyTotalStatus": {
-        "anyOf": [
-          {
-            "enum": [
-              "known",
-              "unknown_charges",
-              "conflicting_charges",
-              "invalid_price",
-              "unknown_mandatory_recurring_fees"
-            ],
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "reportedDeposit": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "unknownComponents": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "upfrontCostIsExact": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "upfrontCostIsLowerBound": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "required": [
-      "baseMonthly",
-      "chargesMonthly",
-      "chargesIncluded",
-      "monthlyTotal",
-      "monthlyTotalStatus",
-      "knownMonthlyLowerBound",
-      "estimatedMonthlyTotal",
-      "estimatedMonthlyTotalIsLowerBound",
-      "estimatedUtilitiesMonthly",
-      "indicativeInsuranceMonthly",
-      "heatingMayBeDoubleCounted",
-      "firstChargeAdvance",
-      "reportedDeposit",
-      "deposit",
-      "depositMaximum",
-      "depositExceedsMaximum",
-      "agencyFee",
-      "agencyFeeBasis",
-      "mandatoryRecurringFees",
-      "mandatoryRecurringFeeTotal",
-      "mandatoryMoveInFees",
-      "mandatoryMoveInFeeTotal",
-      "knownUpfrontCost",
-      "exactUpfrontCost",
-      "upfrontCostIsLowerBound",
-      "upfrontCostIsExact",
-      "unknownComponents"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "agencyFee": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "agencyFeeBasis": {
+        "anyOf": [
+          {
+            "enum": [
+              "tenant_share",
+              "total_commission",
+              "unknown"
+            ],
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "baseMonthly": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "chargesIncluded": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "chargesMonthly": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "deposit": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "depositExceedsMaximum": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "depositMaximum": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "estimatedMonthlyTotal": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "estimatedMonthlyTotalIsLowerBound": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "estimatedUtilitiesMonthly": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "exactUpfrontCost": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "firstChargeAdvance": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "heatingMayBeDoubleCounted": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "indicativeInsuranceMonthly": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "knownMonthlyLowerBound": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "knownUpfrontCost": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "mandatoryMoveInFeeTotal": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "mandatoryMoveInFees": {
+        "items": {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "mandatoryRecurringFeeTotal": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "mandatoryRecurringFees": {
+        "items": {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "monthlyTotal": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "monthlyTotalStatus": {
+        "anyOf": [
+          {
+            "enum": [
+              "known",
+              "unknown_charges",
+              "conflicting_charges",
+              "invalid_price",
+              "unknown_mandatory_recurring_fees"
+            ],
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "reportedDeposit": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "unknownComponents": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "upfrontCostIsExact": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "upfrontCostIsLowerBound": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "baseMonthly",
+      "chargesMonthly",
+      "chargesIncluded",
+      "monthlyTotal",
+      "monthlyTotalStatus",
+      "knownMonthlyLowerBound",
+      "estimatedMonthlyTotal",
+      "estimatedMonthlyTotalIsLowerBound",
+      "estimatedUtilitiesMonthly",
+      "indicativeInsuranceMonthly",
+      "heatingMayBeDoubleCounted",
+      "firstChargeAdvance",
+      "reportedDeposit",
+      "deposit",
+      "depositMaximum",
+      "depositExceedsMaximum",
+      "agencyFee",
+      "agencyFeeBasis",
+      "mandatoryRecurringFees",
+      "mandatoryRecurringFeeTotal",
+      "mandatoryMoveInFees",
+      "mandatoryMoveInFeeTotal",
+      "knownUpfrontCost",
+      "exactUpfrontCost",
+      "upfrontCostIsLowerBound",
+      "upfrontCostIsExact",
+      "unknownComponents"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / listings / items / properties / source / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "agencyConfirmedAt": {
-        "anyOf": [
-          {
-            "format": "date-time",
-            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "agencyListingId": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "agencyName": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "lastSeenAt": {
-        "anyOf": [
-          {
-            "format": "date-time",
-            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "listingUrl": {
-        "format": "uri",
-        "type": "string"
-      },
-      "status": {
-        "enum": [
-          "active",
-          "under_offer",
-          "unknown"
-        ],
-        "type": "string"
-      },
-      "statusBasis": {
-        "enum": [
-          "source_catalog_seen",
-          "listing_record_active"
-        ],
-        "type": "string"
-      },
-      "type": {
-        "const": "original_agency_listing",
-        "type": "string"
-      }
-    },
-    "required": [
-      "type",
-      "agencyName",
-      "listingUrl",
-      "agencyListingId",
-      "lastSeenAt",
-      "status",
-      "statusBasis",
-      "agencyConfirmedAt"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "agencyConfirmedAt": {
+        "anyOf": [
+          {
+            "format": "date-time",
+            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "agencyListingId": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "agencyName": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "lastSeenAt": {
+        "anyOf": [
+          {
+            "format": "date-time",
+            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "listingUrl": {
+        "format": "uri",
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "active",
+          "under_offer",
+          "unknown"
+        ],
+        "type": "string"
+      },
+      "statusBasis": {
+        "enum": [
+          "source_catalog_seen",
+          "listing_record_active"
+        ],
+        "type": "string"
+      },
+      "type": {
+        "const": "original_agency_listing",
+        "type": "string"
+      }
+    },
+    "required": [
+      "type",
+      "agencyName",
+      "listingUrl",
+      "agencyListingId",
+      "lastSeenAt",
+      "status",
+      "statusBasis",
+      "agencyConfirmedAt"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / understanding / properties / checked / items / properties / unit / anyOf
```
Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / understanding / properties / checked / items / properties / unit / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / understanding / properties / checked / items / properties / value / anyOf

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

addedOutput schema / properties / understanding / properties / checked / items / properties / value / type
```
Added value: +[
+  "number",
+  "string",
+  "null"
+]
```
removedOutput schema / properties / understanding / properties / commutes / items / properties / maxMinutes / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / understanding / properties / commutes / items / properties / maxMinutes / type
```
Added value: +[
+  "number",
+  "null"
+]
```
removedOutput schema / properties / understanding / properties / places / items / properties / radiusKm / anyOf
```
Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / understanding / properties / places / items / properties / radiusKm / type
```
Added value: +[
+  "number",
+  "null"
+]
```

Changed45 schema fields changedOct 30, 2026

addedInput schema / additionalProperties
```
Added value: +false
```
removedInput schema / properties / balcony / description
```
Removed value: -"Require a source-confirmed balcony"
```

changedInput schema / properties / commune / description

Previous value: -"Luxembourg commune name or slug"New value: +"Supported municipality, city quarter or village name; use resolve_location if ambiguous"

addedInput schema / properties / commune / maxLength
```
Added value: +150
```
addedInput schema / properties / commune / minLength
```
Added value: +1
```
removedInput schema / properties / elevator / description
```
Removed value: -"Require lift/elevator evidence"
```
removedInput schema / properties / furnished / description
```
Removed value: -"Require furnished evidence"
```
removedInput schema / properties / garden / description
```
Removed value: -"Require a source-confirmed garden"
```

addedInput schema / properties / includeCrossBorder

Added value: +{
+  "description": "Include supported Grande Région inventory; default false keeps Luxembourg-only compatibility",
+  "type": "boolean"
+}

removedInput schema / properties / includePhotos / description

Removed value: -"Attach thumbnail photos of the top results as image content blocks (default: true). Set false for a lean text-only response."

removedInput schema / properties / limit / description

Removed value: -"Number of results to return (max 50, default 20)"

changedInput schema / properties / limit / type

Previous value: -"number"New value: +"integer"

removedInput schema / properties / maxAreaSqm / description
```
Removed value: -"Maximum area in m²"
```
addedInput schema / properties / maxAreaSqm / maximum
```
Added value: +100000
```
addedInput schema / properties / maxAreaSqm / minimum
```
Added value: +0
```
removedInput schema / properties / maxPrice / description
```
Removed value: -"Maximum sale price in EUR"
```
addedInput schema / properties / maxPrice / maximum
```
Added value: +100000000
```
addedInput schema / properties / maxPrice / minimum
```
Added value: +0
```

addedInput schema / properties / maxTotalMonthly

Added value: +{
+  "description": "Rental-only confirmed all-in monthly ceiling; missing cost evidence is excluded",
+  "maximum": 100000,
+  "minimum": 0,
+  "type": "number"
+}

removedInput schema / properties / minAreaSqm / description
```
Removed value: -"Minimum area in m²"
```
addedInput schema / properties / minAreaSqm / maximum
```
Added value: +100000
```
addedInput schema / properties / minAreaSqm / minimum
```
Added value: +0
```
removedInput schema / properties / minBathrooms / description
```
Removed value: -"Minimum number of bathrooms"
```
addedInput schema / properties / minBathrooms / maximum
```
Added value: +100
```
addedInput schema / properties / minBathrooms / minimum
```
Added value: +0
```
changedInput schema / properties / minBathrooms / type
```
Previous value: -"number"New value: +"integer"
```
removedInput schema / properties / minBeds / description
```
Removed value: -"Minimum number of bedrooms"
```
addedInput schema / properties / minBeds / maximum
```
Added value: +100
```
addedInput schema / properties / minBeds / minimum
```
Added value: +0
```

changedInput schema / properties / minBeds / type

Previous value: -"number"New value: +"integer"

removedInput schema / properties / minPrice / description
```
Removed value: -"Minimum sale price in EUR"
```
addedInput schema / properties / minPrice / maximum
```
Added value: +100000000
```
addedInput schema / properties / minPrice / minimum
```
Added value: +0
```
removedInput schema / properties / parkingType / description
```
Removed value: -"Require source-backed parking evidence"
```
removedInput schema / properties / petsAllowed / description
```
Removed value: -"Require pets-allowed evidence"
```

removedInput schema / properties / propertyType / description

Removed value: -"Property type: apartment, house, villa, etc."

addedInput schema / properties / propertyType / enum

Added value: +[
+  "apartment",
+  "house",
+  "studio",
+  "room",
+  "commercial",
+  "office",
+  "land",
+  "multi_unit_building",
+  "garage_parking"
+]

addedInput schema / properties / shownListingIds

Added value: +{
+  "description": "Already shown listing IDs, accumulated across pages. Excludes those IDs from this live result window; not a stable market snapshot.",
+  "items": {
+    "pattern": "^[A-Za-z0-9_-]{1,128}$",
+    "type": "string"
+  },
+  "maxItems": 200,
+  "type": "array"
+}

removedInput schema / properties / sort / description

Removed value: -"Sort by relevance, listing date, or asking price"

addedOutput schema / properties / listings / items / properties / match / properties / closeReasons

Added value: +{
+  "items": {
+    "oneOf": [
+      {
+        "additionalProperties": false,
+        "properties": {
+          "concept": {
+            "type": "string"
+          },
+          "criterionId": {
+            "type": "string"
+          },
+          "kind": {
+            "const": "not_confirmed",
+            "type": "string"
+          },
+          "label": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "kind",
+          "criterionId",
+          "concept",
+          "label"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "actual": {
+            "type": "number"
+          },
+          "concept": {
+            "type": "string"
+          },
+          "criterionId": {
+            "type": "string"
+          },
+          "delta": {
+            "minimum": 0,
+            "type": "number"
+          },
+          "direction": {
+            "enum": [
+              "over",
+              "under"
+            ],
+            "type": "string"
+          },
+          "expected": {
+            "type": "number"
+          },
+          "field": {
+            "type": "string"
+          },
+          "kind": {
+            "const": "numeric",
+            "type": "string"
+          }
+        },
+        "required": [
+          "kind",
+          "criterionId",
+          "concept",
+          "field",
+          "expected",
+          "actual",
+          "delta",
+          "direction"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "actualLocalityId": {
+            "type": "string"
+          },
+          "actualName": {
+            "type": "string"
+          },
+          "askedLocalityId": {
+            "type": "string"
+          },
+          "askedName": {
+            "type": "string"
+          },
+          "distanceKm": {
+            "maximum": 12,
+            "minimum": 0,
+            "type": "number"
+          },
+          "kind": {
+            "const": "nearby_commune",
+            "type": "string"
+          }
+        },
+        "required": [
+          "kind",
+          "askedLocalityId",
+          "actualLocalityId",
+          "askedName",
+          "actualName",
+          "distanceKm"
+        ],
+        "type": "object"
+      }
+    ]
+  },
+  "type": "array"
+}

changedOutput schema / properties / listings / items / properties / match / properties / resultKind / anyOf

Previous value: -[
-  {
-    "enum": [
-      "strict_match",
-      "partial_match",
-      "relaxed_alternative"
-    ],
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "enum": [
+      "match",
+      "close"
+    ],
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / understanding / properties / checked / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / commutes / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / notChecked / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / places / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

Changed6 schema fields changedOct 24, 2026

removedOutput schema / properties / listings / items / properties / match / properties / closeReasons

Removed value: -{
-  "items": {
-    "oneOf": [
-      {
-        "additionalProperties": false,
-        "properties": {
-          "concept": {
-            "type": "string"
-          },
-          "criterionId": {
-            "type": "string"
-          },
-          "kind": {
-            "const": "not_confirmed",
-            "type": "string"
-          },
-          "label": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "kind",
-          "criterionId",
-          "concept",
-          "label"
-        ],
-        "type": "object"
-      },
-      {
-        "additionalProperties": false,
-        "properties": {
-          "actual": {
-            "type": "number"
-          },
-          "concept": {
-            "type": "string"
-          },
-          "criterionId": {
-            "type": "string"
-          },
-          "delta": {
-            "minimum": 0,
-            "type": "number"
-          },
-          "direction": {
-            "enum": [
-              "over",
-              "under"
-            ],
-            "type": "string"
-          },
-          "expected": {
-            "type": "number"
-          },
-          "field": {
-            "type": "string"
-          },
-          "kind": {
-            "const": "numeric",
-            "type": "string"
-          }
-        },
-        "required": [
-          "kind",
-          "criterionId",
-          "concept",
-          "field",
-          "expected",
-          "actual",
-          "delta",
-          "direction"
-        ],
-        "type": "object"
-      },
-      {
-        "additionalProperties": false,
-        "properties": {
-          "actualLocalityId": {
-            "type": "string"
-          },
-          "actualName": {
-            "type": "string"
-          },
-          "askedLocalityId": {
-            "type": "string"
-          },
-          "askedName": {
-            "type": "string"
-          },
-          "distanceKm": {
-            "maximum": 12,
-            "minimum": 0,
-            "type": "number"
-          },
-          "kind": {
-            "const": "nearby_commune",
-            "type": "string"
-          }
-        },
-        "required": [
-          "kind",
-          "askedLocalityId",
-          "actualLocalityId",
-          "askedName",
-          "actualName",
-          "distanceKm"
-        ],
-        "type": "object"
-      }
-    ]
-  },
-  "type": "array"
-}

changedOutput schema / properties / listings / items / properties / match / properties / resultKind / anyOf

Previous value: -[
-  {
-    "enum": [
-      "match",
-      "close"
-    ],
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "enum": [
+      "strict_match",
+      "partial_match",
+      "relaxed_alternative"
+    ],
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / understanding / properties / checked / items / properties / force / enum

Previous value: -[
-  "dealbreaker",
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / commutes / items / properties / force / enum

Previous value: -[
-  "dealbreaker",
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / notChecked / items / properties / force / enum

Previous value: -[
-  "dealbreaker",
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / places / items / properties / force / enum

Previous value: -[
-  "dealbreaker",
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "must",
+  "should",
+  "nice"
+]

Changed6 schema fields changedOct 23, 2026

addedOutput schema / properties / listings / items / properties / match / properties / closeReasons

Added value: +{
+  "items": {
+    "oneOf": [
+      {
+        "additionalProperties": false,
+        "properties": {
+          "concept": {
+            "type": "string"
+          },
+          "criterionId": {
+            "type": "string"
+          },
+          "kind": {
+            "const": "not_confirmed",
+            "type": "string"
+          },
+          "label": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "kind",
+          "criterionId",
+          "concept",
+          "label"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "actual": {
+            "type": "number"
+          },
+          "concept": {
+            "type": "string"
+          },
+          "criterionId": {
+            "type": "string"
+          },
+          "delta": {
+            "minimum": 0,
+            "type": "number"
+          },
+          "direction": {
+            "enum": [
+              "over",
+              "under"
+            ],
+            "type": "string"
+          },
+          "expected": {
+            "type": "number"
+          },
+          "field": {
+            "type": "string"
+          },
+          "kind": {
+            "const": "numeric",
+            "type": "string"
+          }
+        },
+        "required": [
+          "kind",
+          "criterionId",
+          "concept",
+          "field",
+          "expected",
+          "actual",
+          "delta",
+          "direction"
+        ],
+        "type": "object"
+      },
+      {
+        "additionalProperties": false,
+        "properties": {
+          "actualLocalityId": {
+            "type": "string"
+          },
+          "actualName": {
+            "type": "string"
+          },
+          "askedLocalityId": {
+            "type": "string"
+          },
+          "askedName": {
+            "type": "string"
+          },
+          "distanceKm": {
+            "maximum": 12,
+            "minimum": 0,
+            "type": "number"
+          },
+          "kind": {
+            "const": "nearby_commune",
+            "type": "string"
+          }
+        },
+        "required": [
+          "kind",
+          "askedLocalityId",
+          "actualLocalityId",
+          "askedName",
+          "actualName",
+          "distanceKm"
+        ],
+        "type": "object"
+      }
+    ]
+  },
+  "type": "array"
+}

changedOutput schema / properties / listings / items / properties / match / properties / resultKind / anyOf

Previous value: -[
-  {
-    "enum": [
-      "strict_match",
-      "partial_match",
-      "relaxed_alternative"
-    ],
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "enum": [
+      "match",
+      "close"
+    ],
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / understanding / properties / checked / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / commutes / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / notChecked / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

changedOutput schema / properties / understanding / properties / places / items / properties / force / enum

Previous value: -[
-  "must",
-  "should",
-  "nice"
-]New value: +[
+  "dealbreaker",
+  "must",
+  "should",
+  "nice"
+]

Changed1 schema field changedOct 1, 2026

addedOutput schema / properties / listings / items / properties / unknown

Added value: +{
+  "description": "Why each missingFields entry is unknown. not_in_search_result means get_listing may know it.",
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "field": {
+        "type": "string"
+      },
+      "reason": {
+        "enum": [
+          "not_stated",
+          "not_proven",
+          "conflicted",
+          "not_in_search_result"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "field",
+      "reason"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Changed4 schema fields changedSep 28, 2026

removedOutput schema / properties / coverageNotice

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "reason": {
-      "const": "outside_luxembourg",
-      "type": "string"
-    }
-  },
-  "required": [
-    "reason"
-  ],
-  "type": "object"
-}

addedOutput schema / properties / followUp

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "outcome": {
+      "enum": [
+        "applied",
+        "answered"
+      ],
+      "type": "string"
+    },
+    "reply": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "outcome"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / session

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "brief": {
+      "additionalProperties": {},
+      "properties": {},
+      "type": "object"
+    }
+  },
+  "required": [
+    "brief"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / understanding

Added value: +{
+  "additionalProperties": false,
+  "description": "What the engine understood from the request. notChecked lists wishes no returned home is confirmed to have.",
+  "properties": {
+    "checked": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "force": {
+            "enum": [
+              "must",
+              "should",
+              "nice"
+            ],
+            "type": "string"
+          },
+          "meaning": {
+            "type": "string"
+          },
+          "needId": {
+            "type": "string"
+          },
+          "operator": {
+            "type": "string"
+          },
+          "unit": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "value": {
+            "anyOf": [
+              {
+                "anyOf": [
+                  {
+                    "type": "number"
+                  },
+                  {
+                    "type": "string"
+                  }
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ]
+          }
+        },
+        "required": [
+          "meaning",
+          "needId",
+          "operator",
+          "value",
+          "unit",
+          "force"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "commutes": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "destination": {
+            "type": "string"
+          },
+          "force": {
+            "enum": [
+              "must",
+              "should",
+              "nice"
+            ],
+            "type": "string"
+          },
+          "maxMinutes": {
+            "anyOf": [
+              {
+                "type": "number"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "mode": {
+            "anyOf": [
+              {
+                "enum": [
+                  "transit",
+                  "drive",
+                  "walk",
+                  "bike"
+                ],
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          }
+        },
+        "required": [
+          "destination",
+          "mode",
+          "maxMinutes",
+          "force"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "excludedPropertyTypes": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "notChecked": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "force": {
+            "enum": [
+              "must",
+              "should",
+              "nice"
+            ],
+            "type": "string"
+          },
+          "meaning": {
+            "type": "string"
+          },
+          "reason": {
+            "enum": [
+              "no_listing_fact",
+              "fact_not_collected_yet"
+            ],
+            "type": "string"
+          }
+        },
+        "required": [
+          "meaning",
+          "force",
+          "reason"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "offer": {
+      "enum": [
+        "whole",
+        "room",
+        "either"
+      ],
+      "type": "string"
+    },
+    "places": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "country": {
+            "anyOf": [
+              {
+                "enum": [
+                  "LU",
+                  "FR",
+                  "BE",
+                  "DE"
+                ],
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "force": {
+            "enum": [
+              "must",
+              "should",
+              "nice"
+            ],
+            "type": "string"
+          },
+          "kind": {
+            "type": "string"
+          },
+          "name": {
+            "type": "string"
+          },
+          "radiusKm": {
+            "anyOf": [
+              {
+                "type": "number"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "role": {
+            "enum": [
+              "live",
+              "work",
+              "near",
+              "avoid"
+            ],
+            "type": "string"
+          }
+        },
+        "required": [
+          "name",
+          "role",
+          "kind",
+          "country",
+          "radiusKm",
+          "force"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "propertyTypes": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "transaction": {
+      "anyOf": [
+        {
+          "enum": [
+            "buy",
+            "rent"
+          ],
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "understood": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "understood",
+    "transaction",
+    "propertyTypes",
+    "excludedPropertyTypes",
+    "offer",
+    "places",
+    "commutes",
+    "checked",
+    "notChecked"
+  ],
+  "type": "object"
+}

Changed34 schema fields changedAug 31, 2026

addedInput schema / properties / balcony

Added value: +{
+  "const": true,
+  "description": "Require a source-confirmed balcony",
+  "type": "boolean"
+}

addedInput schema / properties / elevator

Added value: +{
+  "const": true,
+  "description": "Require lift/elevator evidence",
+  "type": "boolean"
+}

addedInput schema / properties / furnished

Added value: +{
+  "const": true,
+  "description": "Require furnished evidence",
+  "type": "boolean"
+}

addedInput schema / properties / garden

Added value: +{
+  "const": true,
+  "description": "Require a source-confirmed garden",
+  "type": "boolean"
+}

addedInput schema / properties / maxAreaSqm

Added value: +{
+  "description": "Maximum area in m²",
+  "type": "number"
+}

addedInput schema / properties / minBathrooms

Added value: +{
+  "description": "Minimum number of bathrooms",
+  "type": "number"
+}

addedInput schema / properties / parkingType

Added value: +{
+  "description": "Require source-backed parking evidence",
+  "enum": [
+    "off_street",
+    "garage",
+    "covered"
+  ],
+  "type": "string"
+}

addedInput schema / properties / petsAllowed

Added value: +{
+  "const": true,
+  "description": "Require pets-allowed evidence",
+  "type": "boolean"
+}

addedInput schema / properties / sort

Added value: +{
+  "description": "Sort by relevance, listing date, or asking price",
+  "enum": [
+    "relevance",
+    "newest",
+    "price-asc",
+    "price-desc"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / excludedUnprovenCount

Added value: +{
+  "description": "Upstream rows omitted because public facts could not prove every requested hard filter.",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

addedOutput schema / properties / hasMore
```
Added value: +{
+  "type": "boolean"
+}
```

addedOutput schema / properties / listings / items / properties / amenities

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "balcony": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "elevator": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "furnished": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "garden": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "parking": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "petsAllowed": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "stepFreeAccess": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "wheelchairAccessible": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "required": [
+    "furnished",
+    "elevator",
+    "parking",
+    "balcony",
+    "garden",
+    "petsAllowed",
+    "stepFreeAccess",
+    "wheelchairAccessible"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / availability

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "availableFrom": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "moveInState": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "offerStatus": {
+      "enum": [
+        "available",
+        "under_offer",
+        "unknown"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "offerStatus",
+    "availableFrom",
+    "moveInState"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / duplicates

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "confirmedOtherSources": {
+      "maximum": 9007199254740991,
+      "minimum": 0,
+      "type": "integer"
+    },
+    "confirmedSourceCount": {
+      "exclusiveMinimum": 0,
+      "maximum": 9007199254740991,
+      "type": "integer"
+    }
+  },
+  "required": [
+    "confirmedOtherSources",
+    "confirmedSourceCount"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / fieldProvenance

Added value: +{
+  "additionalProperties": {
+    "additionalProperties": false,
+    "properties": {
+      "method": {
+        "enum": [
+          "source_structured",
+          "source_text",
+          "official_dataset",
+          "calculation",
+          "manual_review",
+          "model_extraction",
+          "model_only",
+          "unknown"
+        ],
+        "type": "string"
+      },
+      "observedAt": {
+        "anyOf": [
+          {
+            "format": "date-time",
+            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "publisher": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "sourceUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "status": {
+        "enum": [
+          "confirmed",
+          "estimated",
+          "thin_sample",
+          "stale",
+          "context_only",
+          "conflicted",
+          "not_collected",
+          "source_unavailable",
+          "suppressed"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "status",
+      "publisher",
+      "method",
+      "sourceUrl",
+      "observedAt"
+    ],
+    "type": "object"
+  },
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / history

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "daysListed": {
+      "anyOf": [
+        {
+          "maximum": 9007199254740991,
+          "minimum": 0,
+          "type": "integer"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "firstObservedAt": {
+      "anyOf": [
+        {
+          "format": "date-time",
+          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "firstObservedBasis": {
+      "const": "source_listing_date_or_chathome_ingest",
+      "type": "string"
+    },
+    "lastChangedAt": {
+      "anyOf": [
+        {
+          "format": "date-time",
+          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "priceDropTotalEur": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "required": [
+    "firstObservedAt",
+    "firstObservedBasis",
+    "daysListed",
+    "priceDropTotalEur",
+    "lastChangedAt"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / location

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "address": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "city": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "confidence": {
+      "enum": [
+        "verified",
+        "unverified",
+        "contradicted",
+        "unknown"
+      ],
+      "type": "string"
+    },
+    "district": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "postalCode": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "precision": {
+      "enum": [
+        "exact_address",
+        "street",
+        "district",
+        "commune_only",
+        "unknown"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "city",
+    "district",
+    "address",
+    "postalCode",
+    "precision",
+    "confidence"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / match

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "allRequiredConstraintsSatisfied": {
+      "anyOf": [
+        {
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "reasons": {
+      "items": {
+        "type": "string"
+      },
+      "maxItems": 3,
+      "type": "array"
+    },
+    "requiredConstraints": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "actual": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "number"
+              },
+              {
+                "type": "boolean"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "id": {
+            "type": "string"
+          },
+          "status": {
+            "enum": [
+              "matched",
+              "not_matched",
+              "not_verified",
+              "not_applied"
+            ],
+            "type": "string"
+          },
+          "target": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "number"
+              },
+              {
+                "type": "boolean"
+              },
+              {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          }
+        },
+        "required": [
+          "id",
+          "status",
+          "target",
+          "actual"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "resultKind": {
+      "anyOf": [
+        {
+          "enum": [
+            "strict_match",
+            "partial_match",
+            "relaxed_alternative"
+          ],
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "required": [
+    "allRequiredConstraintsSatisfied",
+    "resultKind",
+    "requiredConstraints",
+    "reasons"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / missingFields

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / listings / items / properties / officialScreening

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

addedOutput schema / properties / listings / items / properties / property

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "airConditioning": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "colocation": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "completionYear": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "condition": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "constructionYear": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "floor": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "hasFloorplan": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "heatingEnergy": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "heatingType": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "landAreaSqm": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "privateRoomAreaSqm": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "rentByOwner": {
+      "anyOf": [
+        {
+          "const": true,
+          "type": "boolean"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "rooms": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "totalFloors": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "required": [
+    "rooms",
+    "floor",
+    "totalFloors",
+    "constructionYear",
+    "completionYear",
+    "landAreaSqm",
+    "privateRoomAreaSqm",
+    "condition",
+    "heatingType",
+    "heatingEnergy",
+    "airConditioning",
+    "hasFloorplan",
+    "rentByOwner",
+    "colocation"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / listings / items / properties / propertyChecks

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

addedOutput schema / properties / listings / items / properties / rent

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "agencyFee": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "agencyFeeBasis": {
+          "anyOf": [
+            {
+              "enum": [
+                "tenant_share",
+                "total_commission",
+                "unknown"
+              ],
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "baseMonthly": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "chargesIncluded": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "chargesMonthly": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "deposit": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "depositExceedsMaximum": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "depositMaximum": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "estimatedMonthlyTotal": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "estimatedMonthlyTotalIsLowerBound": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "estimatedUtilitiesMonthly": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "exactUpfrontCost": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "firstChargeAdvance": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "heatingMayBeDoubleCounted": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "indicativeInsuranceMonthly": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "knownMonthlyLowerBound": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "knownUpfrontCost": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "mandatoryMoveInFeeTotal": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "mandatoryMoveInFees": {
+          "items": {
+            "additionalProperties": {},
+            "properties": {},
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "mandatoryRecurringFeeTotal": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "mandatoryRecurringFees": {
+          "items": {
+            "additionalProperties": {},
+            "properties": {},
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "monthlyTotal": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "monthlyTotalStatus": {
+          "anyOf": [
+            {
+              "enum": [
+                "known",
+                "unknown_charges",
+                "conflicting_charges",
+                "invalid_price",
+                "unknown_mandatory_recurring_fees"
+              ],
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "reportedDeposit": {
+          "anyOf": [
+            {
+              "type": "number"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "unknownComponents": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "upfrontCostIsExact": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "upfrontCostIsLowerBound": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "baseMonthly",
+        "chargesMonthly",
+        "chargesIncluded",
+        "monthlyTotal",
+        "monthlyTotalStatus",
+        "knownMonthlyLowerBound",
+        "estimatedMonthlyTotal",
+        "estimatedMonthlyTotalIsLowerBound",
+        "estimatedUtilitiesMonthly",
+        "indicativeInsuranceMonthly",
+        "heatingMayBeDoubleCounted",
+        "firstChargeAdvance",
+        "reportedDeposit",
+        "deposit",
+        "depositMaximum",
+        "depositExceedsMaximum",
+        "agencyFee",
+        "agencyFeeBasis",
+        "mandatoryRecurringFees",
+        "mandatoryRecurringFeeTotal",
+        "mandatoryMoveInFees",
+        "mandatoryMoveInFeeTotal",
+        "knownUpfrontCost",
+        "exactUpfrontCost",
+        "upfrontCostIsLowerBound",
+        "upfrontCostIsExact",
+        "unknownComponents"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / schemaVersion
```
Added value: +{
+  "const": "agent-listing.v2",
+  "type": "string"
+}
```

addedOutput schema / properties / listings / items / properties / source

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "agencyConfirmedAt": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "agencyListingId": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "agencyName": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "lastSeenAt": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "listingUrl": {
+          "format": "uri",
+          "type": "string"
+        },
+        "status": {
+          "enum": [
+            "active",
+            "under_offer",
+            "unknown"
+          ],
+          "type": "string"
+        },
+        "statusBasis": {
+          "enum": [
+            "source_catalog_seen",
+            "listing_record_active"
+          ],
+          "type": "string"
+        },
+        "type": {
+          "const": "original_agency_listing",
+          "type": "string"
+        }
+      },
+      "required": [
+        "type",
+        "agencyName",
+        "listingUrl",
+        "agencyListingId",
+        "lastSeenAt",
+        "status",
+        "statusBasis",
+        "agencyConfirmedAt"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / transport

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

addedOutput schema / properties / listings / items / properties / valueContext

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "fairPrice": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "marketContext": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "priceIntegrity": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "required": [
+    "priceIntegrity",
+    "fairPrice",
+    "marketContext"
+  ],
+  "type": "object"
+}

changedOutput schema / properties / listings / items / required

Previous value: -[
-  "id",
-  "url",
-  "title",
-  "status",
-  "price",
-  "currency",
-  "listingType",
-  "propertyType",
-  "city",
-  "district",
-  "country",
-  "beds",
-  "baths",
-  "areaSqm",
-  "energyClass",
-  "imageUrl",
-  "agencyName",
-  "latitude",
-  "longitude"
-]New value: +[
+  "schemaVersion",
+  "id",
+  "url",
+  "title",
+  "status",
+  "price",
+  "currency",
+  "listingType",
+  "propertyType",
+  "city",
+  "district",
+  "country",
+  "beds",
+  "baths",
+  "areaSqm",
+  "energyClass",
+  "imageUrl",
+  "agencyName",
+  "source",
+  "rent",
+  "availability",
+  "property",
+  "location",
+  "history",
+  "duplicates",
+  "amenities",
+  "fieldProvenance",
+  "officialScreening",
+  "propertyChecks",
+  "transport",
+  "valueContext",
+  "missingFields",
+  "match",
+  "latitude",
+  "longitude"
+]

addedOutput schema / properties / marketMatchingUpperBound

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 9007199254740991,
+      "minimum": 0,
+      "type": "integer"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / matchingCount

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 9007199254740991,
+      "minimum": 0,
+      "type": "integer"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / matchingCountKind

Added value: +{
+  "enum": [
+    "exact",
+    "lower_bound",
+    "unavailable"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / nextCursor
```
Added value: +{
+  "type": "null"
+}
```

addedOutput schema / properties / returnedCount

Added value: +{
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

addedOutput schema / properties / searchExhaustive
```
Added value: +{
+  "type": "boolean"
+}
```

Changed34 schema fields changedAug 30, 2026

addedOutput schema / properties / countKind

Added value: +{
+  "const": "returned",
+  "type": "string"
+}

addedOutput schema / properties / listings / items / properties / agencyName

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / areaSqm

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / baths

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / beds

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / charges

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / city

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / country

Added value: +{
+  "anyOf": [
+    {
+      "enum": [
+        "LU",
+        "FR",
+        "BE",
+        "DE"
+      ],
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / currency
```
Added value: +{
+  "const": "EUR",
+  "type": "string"
+}
```

addedOutput schema / properties / listings / items / properties / description

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / district

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / energyClass

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / features

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / listings / items / properties / hasSourceCheckedFacts
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / listings / items / properties / id
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / listings / items / properties / imageUrl

Added value: +{
+  "anyOf": [
+    {
+      "format": "uri",
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / latitude

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / listingType

Added value: +{
+  "enum": [
+    "rent",
+    "sale"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / listings / items / properties / longitude

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / matchReasons

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "maxItems": 3,
+  "type": "array"
+}

addedOutput schema / properties / listings / items / properties / photoUrls

Added value: +{
+  "items": {
+    "format": "uri",
+    "type": "string"
+  },
+  "maxItems": 5,
+  "type": "array"
+}

addedOutput schema / properties / listings / items / properties / price

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / pricePerSqm

Added value: +{
+  "anyOf": [
+    {
+      "type": "number"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / propertyType

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / listings / items / properties / score

Added value: +{
+  "maximum": 100,
+  "minimum": 0,
+  "type": "number"
+}

addedOutput schema / properties / listings / items / properties / status
```
Added value: +{
+  "const": "active",
+  "type": "string"
+}
```
addedOutput schema / properties / listings / items / properties / title
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / listings / items / properties / url
```
Added value: +{
+  "format": "uri",
+  "type": "string"
+}
```

addedOutput schema / properties / listings / items / required

Added value: +[
+  "id",
+  "url",
+  "title",
+  "status",
+  "price",
+  "currency",
+  "listingType",
+  "propertyType",
+  "city",
+  "district",
+  "country",
+  "beds",
+  "baths",
+  "areaSqm",
+  "energyClass",
+  "imageUrl",
+  "agencyName",
+  "latitude",
+  "longitude"
+]

addedOutput schema / properties / ranking

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "planFingerprint": {
+      "type": "string"
+    },
+    "probability": {
+      "const": false,
+      "type": "boolean"
+    },
+    "scoreKind": {
+      "const": "request_fit",
+      "type": "string"
+    },
+    "status": {
+      "enum": [
+        "available",
+        "degraded"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "status",
+    "scoreKind",
+    "probability"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / total / description

Added value: +"Exact number of listing objects returned in this response; not the number of matches in the market."

addedOutput schema / properties / total / maximum
```
Added value: +9007199254740991
```
addedOutput schema / properties / total / minimum
```
Added value: +0
```

changedOutput schema / properties / total / type

Previous value: -"number"New value: +"integer"

Changed1 schema field changedAug 29, 2026

addedOutput schema / properties / coverageNotice

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "reason": {
+      "const": "outside_luxembourg",
+      "type": "string"
+    }
+  },
+  "required": [
+    "reason"
+  ],
+  "type": "object"
+}

First observedAug 21, 2026

TDQS

A3.8/5.0

Behavior4/5

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

Annotations already declare readOnly/idempotent/openWorld/non-destructive, so the safety profile is covered. The description then adds genuinely new behavior an agent cannot get elsewhere: each result links to the original agency listing, carries a latest catalogue re-sighting timestamp, and top results are attached as image content blocks — important for planning output handling. It does not mention result caps or latency/rate behavior, so not a 5.

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?

Two sentences, front-loaded with the geography default and the cross-border opt-in, and every clause carries information. The second sentence is clause-dense but not padded; nothing is repeated from the title.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists so return values needn't be spelled out, and the description covers the sale scope, the Luxembourg default, cross-border opt-in, and result provenance. For a 21-parameter open-world search tool it is still thin on how to page (shownListingIds), what limit does, and how the amenity const-true filters behave when omitted — gaps an agent will hit on a second call.

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?

With 21 parameters and only 24% schema description coverage, the description carries a real burden. It compensates partially by grouping the filter dimensions (location, price, rooms, area, property type, amenities), naming the sort metadata, and characterizing amenity filters as 'positive-evidence' (i.e. only confirmed features match). It still leaves sort enum options, limit, includePhotos, locale, and the shownListingIds paging mechanism unexplained.

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+scope ('Search properties for sale in Luxembourg by default') and enumerates the filterable dimensions. That combined with the sale-vs-rental framing lets an agent distinguish it from search_rentals and compare_listings without opening any schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It states a clear default operating mode (Luxembourg-only) and an opt-in extension (includeCrossBorder for commuter-belt inventory), which is genuinely useful routing context. But it never says when to prefer a different sibling (e.g. get_listing for a single ID, compare_listings for side-by-side) and gives no guidance on paging across results, so the usage rules remain implied rather than explicit.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All chathome.lu — Luxembourg Real Estate tools Inspect

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