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Brainy Prices — UAE Cost of Living

by ae.brainy
OverviewDiscussionsAdmin

housing_rents

Read-onlyIdempotent

Rent in a Dubai area: registered annual/monthly medians and contract counts. Not listings.

Input Schema

NameRequiredDescriptionDefault
qNo
sortNomedian_annual_aed
zoneNo
cursorNo
zone_idNo
bedroomsNo
contractNo
page_sizeNo
min_contractsNo
property_typeNo

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • removedOutput schema / $schema
      Removed value: -"https://json-schema.org/draft/2020-12/schema"
  2. Changed1 schema field changed
    • removedInput schema / $schema
      Removed value: -"https://json-schema.org/draft/2020-12/schema"
  3. Changed3 schema fields changed
    • removedOutput schema / $defs / HousingZone
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "communities": {
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "communities_ar": {
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "name": {
-      "type": "string"
-    },
-    "name_ar": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "open_in_browser": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "provenance": {
-      "$ref": "#/$defs/Provenance"
-    },
-    "rent_contracts": {
-      "type": [
-        "integer",
-        "null"
-      ]
-    },
-    "sale_transactions": {
-      "type": [
-        "integer",
-        "null"
-      ]
-    },
-    "zone_id": {
-      "type": "string"
-    }
-  },
-  "required": [
-    "zone_id",
-    "name",
-    "name_ar",
-    "communities",
-    "communities_ar",
-    "rent_contracts",
-    "sale_transactions",
-    "open_in_browser",
-    "provenance"
-  ],
-  "type": "object"
-}
    • removedOutput schema / $defs / SaleMedian
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "bedrooms": {
-      "type": "integer"
-    },
-    "market": {
-      "enum": [
-        "ready",
-        "off_plan"
-      ]
-    },
-    "median_aed_per_sqft": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "median_price_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "p25_aed_per_sqft": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "p25_price_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "p75_aed_per_sqft": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "p75_price_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "property_type": {
-      "enum": [
-        "apartment",
-        "villa"
-      ]
-    },
-    "provenance": {
-      "$ref": "#/$defs/Provenance"
-    },
-    "transactions": {
-      "type": [
-        "integer",
-        "null"
-      ]
-    },
-    "zone_id": {
-      "type": "string"
-    },
-    "zone_name": {
-      "type": "string"
-    }
-  },
-  "required": [
-    "zone_id",
-    "zone_name",
-    "property_type",
-    "bedrooms",
-    "market",
-    "transactions",
-    "median_price_aed",
-    "p25_price_aed",
-    "p75_price_aed",
-    "median_aed_per_sqft",
-    "p25_aed_per_sqft",
-    "p75_aed_per_sqft",
-    "provenance"
-  ],
-  "type": "object"
-}
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "context": {
-        "additionalProperties": false,
-        "properties": {
-          "rents": {
-            "items": {
-              "$ref": "#/$defs/RentMedian"
-            },
-            "type": "array"
-          },
-          "sales": {
-            "items": {
-              "$ref": "#/$defs/SaleMedian"
-            },
-            "type": "array"
-          },
-          "zone": {
-            "$ref": "#/$defs/HousingZone"
-          }
-        },
-        "required": [
-          "zone",
-          "rents",
-          "sales"
-        ],
-        "type": "object"
-      },
-      "data": {
-        "items": {
-          "$ref": "#/$defs/RentMedian"
-        },
-        "type": "array"
-      },
-      "links": {
-        "$ref": "#/$defs/Links"
-      },
-      "meta": {
-        "$ref": "#/$defs/ResponseMeta"
-      }
-    },
-    "required": [
-      "meta",
-      "data",
-      "links"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "data": {
-        "items": {
-          "$ref": "#/$defs/HousingZone"
-        },
-        "type": "array"
-      },
-      "links": {
-        "$ref": "#/$defs/Links"
-      },
-      "meta": {
-        "$ref": "#/$defs/ResponseMeta"
-      }
-    },
-    "required": [
-      "meta",
-      "data",
-      "links"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "data": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "communities": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "communities_ar": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "method": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "name": {
-                "type": "string"
-              },
-              "name_ar": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "open_in_browser": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "provenance": {
-                "$ref": "#/$defs/Provenance"
-              },
-              "rent_contracts": {
-                "type": [
-                  "integer",
-                  "null"
-                ]
-              },
-              "rents": {
-                "items": {
-                  "$ref": "#/$defs/RentMedian"
-                },
-                "type": "array"
-              },
-              "sale_transactions": {
-                "type": [
-                  "integer",
-                  "null"
-                ]
-              },
-              "sales": {
-                "items": {
-                  "$ref": "#/$defs/SaleMedian"
-                },
-                "type": "array"
-              },
-              "zone_id": {
-                "type": "string"
-              }
-            },
-            "required": [
-              "zone_id",
-              "name",
-              "name_ar",
-              "communities",
-              "communities_ar",
-              "rent_contracts",
-              "sale_transactions",
-              "open_in_browser",
-              "rents",
-              "sales",
-              "method",
-              "provenance"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "links": {
-        "$ref": "#/$defs/Links"
-      },
-      "meta": {
-        "$ref": "#/$defs/ResponseMeta"
-      }
-    },
-    "required": [
-      "meta",
-      "data",
-      "links"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "error": {
-        "additionalProperties": false,
-        "properties": {
-          "code": {
-            "type": "string"
-          },
-          "message": {
-            "type": "string"
-          },
-          "retry_after_s": {
-            "type": [
-              "integer",
-              "null"
-            ]
-          },
-          "retryable": {
-            "type": "boolean"
-          }
-        },
-        "required": [
-          "code",
-          "message",
-          "retryable",
-          "retry_after_s"
-        ],
-        "type": "object"
-      },
-      "request_id": {
-        "type": [
-          "string",
-          "null"
-        ]
-      }
-    },
-    "required": [
-      "error",
-      "request_id"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "context": {
+        "additionalProperties": true,
+        "required": [
+          "zone",
+          "rents",
+          "sales"
+        ],
+        "type": "object"
+      },
+      "data": {
+        "items": {
+          "$ref": "#/$defs/RentMedian"
+        },
+        "type": "array"
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "communities": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "communities_ar": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "name": {
+              "type": "string"
+            },
+            "name_ar": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "open_in_browser": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "provenance": {
+              "$ref": "#/$defs/Provenance"
+            },
+            "rent_contracts": {
+              "type": [
+                "integer",
+                "null"
+              ]
+            },
+            "sale_transactions": {
+              "type": [
+                "integer",
+                "null"
+              ]
+            },
+            "zone_id": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "zone_id",
+            "name",
+            "name_ar",
+            "communities",
+            "communities_ar",
+            "rent_contracts",
+            "sale_transactions",
+            "open_in_browser",
+            "provenance"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "anyOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "communities": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "communities_ar": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "method": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "name": {
+                "type": "string"
+              },
+              "name_ar": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "open_in_browser": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "provenance": {
+                "$ref": "#/$defs/Provenance"
+              },
+              "rent_contracts": {
+                "type": [
+                  "integer",
+                  "null"
+                ]
+              },
+              "rents": {
+                "items": {
+                  "$ref": "#/$defs/RentMedian"
+                },
+                "type": "array"
+              },
+              "sale_transactions": {
+                "type": [
+                  "integer",
+                  "null"
+                ]
+              },
+              "sales": {
+                "items": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "bedrooms": {
+                      "type": "integer"
+                    },
+                    "market": {
+                      "enum": [
+                        "ready",
+                        "off_plan"
+                      ]
+                    },
+                    "median_aed_per_sqft": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "median_price_aed": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "p25_aed_per_sqft": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "p25_price_aed": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "p75_aed_per_sqft": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "p75_price_aed": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "property_type": {
+                      "enum": [
+                        "apartment",
+                        "villa"
+                      ]
+                    },
+                    "provenance": {
+                      "$ref": "#/$defs/Provenance"
+                    },
+                    "transactions": {
+                      "type": [
+                        "integer",
+                        "null"
+                      ]
+                    },
+                    "zone_id": {
+                      "type": "string"
+                    },
+                    "zone_name": {
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "zone_id",
+                    "zone_name",
+                    "property_type",
+                    "bedrooms",
+                    "market",
+                    "transactions",
+                    "median_price_aed",
+                    "p25_price_aed",
+                    "p75_price_aed",
+                    "median_aed_per_sqft",
+                    "p25_aed_per_sqft",
+                    "p75_aed_per_sqft",
+                    "provenance"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "zone_id": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "zone_id",
+              "name",
+              "name_ar",
+              "communities",
+              "communities_ar",
+              "rent_contracts",
+              "sale_transactions",
+              "open_in_browser",
+              "rents",
+              "sales",
+              "method",
+              "provenance"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "retry_after_s": {
+            "type": [
+              "integer",
+              "null"
+            ]
+          },
+          "retryable": {
+            "type": "boolean"
+          }
+        },
+        "required": [
+          "code",
+          "message",
+          "retryable",
+          "retry_after_s"
+        ],
+        "type": "object"
+      },
+      "request_id": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "error",
+      "request_id"
+    ],
+    "type": "object"
+  }
+]
  4. Changed12 schema fields changed
    • removedInput schema / properties / contract / type
      Removed value: -"string"
    • removedInput schema / properties / property_type / type
      Removed value: -"string"
    • removedInput schema / properties / sort / type
      Removed value: -"string"
    • removedOutput schema / $defs / HousingZoneDetail
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "communities": {
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "communities_ar": {
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "method": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "name": {
-      "type": "string"
-    },
-    "name_ar": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "open_in_browser": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "provenance": {
-      "$ref": "#/$defs/Provenance"
-    },
-    "rent_contracts": {
-      "type": [
-        "integer",
-        "null"
-      ]
-    },
-    "rents": {
-      "items": {
-        "$ref": "#/$defs/RentMedian"
-      },
-      "type": "array"
-    },
-    "sale_transactions": {
-      "type": [
-        "integer",
-        "null"
-      ]
-    },
-    "sales": {
-      "items": {
-        "$ref": "#/$defs/SaleMedian"
-      },
-      "type": "array"
-    },
-    "zone_id": {
-      "type": "string"
-    }
-  },
-  "required": [
-    "zone_id",
-    "name",
-    "name_ar",
-    "communities",
-    "communities_ar",
-    "rent_contracts",
-    "sale_transactions",
-    "open_in_browser",
-    "rents",
-    "sales",
-    "method",
-    "provenance"
-  ],
-  "type": "object"
-}
    • removedOutput schema / $defs / HousingZoneListResponse
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "data": {
-      "items": {
-        "$ref": "#/$defs/HousingZone"
-      },
-      "type": "array"
-    },
-    "links": {
-      "$ref": "#/$defs/Links"
-    },
-    "meta": {
-      "$ref": "#/$defs/ResponseMeta"
-    }
-  },
-  "required": [
-    "meta",
-    "data",
-    "links"
-  ],
-  "type": "object"
-}
    • removedOutput schema / $defs / HousingZoneResponse
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "data": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/HousingZoneDetail"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "links": {
-      "$ref": "#/$defs/Links"
-    },
-    "meta": {
-      "$ref": "#/$defs/ResponseMeta"
-    }
-  },
-  "required": [
-    "meta",
-    "data",
-    "links"
-  ],
-  "type": "object"
-}
    • removedOutput schema / $defs / RentMedian / properties / property_type / type
      Removed value: -"string"
    • removedOutput schema / $defs / RentMedianListResponse
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "context": {
-      "additionalProperties": false,
-      "properties": {
-        "rents": {
-          "items": {
-            "$ref": "#/$defs/RentMedian"
-          },
-          "type": "array"
-        },
-        "sales": {
-          "items": {
-            "$ref": "#/$defs/SaleMedian"
-          },
-          "type": "array"
-        },
-        "zone": {
-          "$ref": "#/$defs/HousingZone"
-        }
-      },
-      "required": [
-        "zone",
-        "rents",
-        "sales"
-      ],
-      "type": "object"
-    },
-    "data": {
-      "items": {
-        "$ref": "#/$defs/RentMedian"
-      },
-      "type": "array"
-    },
-    "links": {
-      "$ref": "#/$defs/Links"
-    },
-    "meta": {
-      "$ref": "#/$defs/ResponseMeta"
-    }
-  },
-  "required": [
-    "meta",
-    "data",
-    "links"
-  ],
-  "type": "object"
-}
    • removedOutput schema / $defs / SaleMedian / properties / market / type
      Removed value: -"string"
    • removedOutput schema / $defs / SaleMedian / properties / property_type / type
      Removed value: -"string"
    • removedOutput schema / $defs / ToolFailure
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "error": {
-      "additionalProperties": false,
-      "properties": {
-        "code": {
-          "type": "string"
-        },
-        "message": {
-          "type": "string"
-        },
-        "retry_after_s": {
-          "type": [
-            "integer",
-            "null"
-          ]
-        },
-        "retryable": {
-          "type": "boolean"
-        }
-      },
-      "required": [
-        "code",
-        "message",
-        "retryable",
-        "retry_after_s"
-      ],
-      "type": "object"
-    },
-    "request_id": {
-      "type": [
-        "string",
-        "null"
-      ]
-    }
-  },
-  "required": [
-    "error",
-    "request_id"
-  ],
-  "type": "object"
-}
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "$ref": "#/$defs/RentMedianListResponse"
-  },
-  {
-    "$ref": "#/$defs/HousingZoneListResponse"
-  },
-  {
-    "$ref": "#/$defs/HousingZoneResponse"
-  },
-  {
-    "$ref": "#/$defs/ToolFailure"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "context": {
+        "additionalProperties": false,
+        "properties": {
+          "rents": {
+            "items": {
+              "$ref": "#/$defs/RentMedian"
+            },
+            "type": "array"
+          },
+          "sales": {
+            "items": {
+              "$ref": "#/$defs/SaleMedian"
+            },
+            "type": "array"
+          },
+          "zone": {
+            "$ref": "#/$defs/HousingZone"
+          }
+        },
+        "required": [
+          "zone",
+          "rents",
+          "sales"
+        ],
+        "type": "object"
+      },
+      "data": {
+        "items": {
+          "$ref": "#/$defs/RentMedian"
+        },
+        "type": "array"
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "items": {
+          "$ref": "#/$defs/HousingZone"
+        },
+        "type": "array"
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "anyOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "communities": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "communities_ar": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "method": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "name": {
+                "type": "string"
+              },
+              "name_ar": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "open_in_browser": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "provenance": {
+                "$ref": "#/$defs/Provenance"
+              },
+              "rent_contracts": {
+                "type": [
+                  "integer",
+                  "null"
+                ]
+              },
+              "rents": {
+                "items": {
+                  "$ref": "#/$defs/RentMedian"
+                },
+                "type": "array"
+              },
+              "sale_transactions": {
+                "type": [
+                  "integer",
+                  "null"
+                ]
+              },
+              "sales": {
+                "items": {
+                  "$ref": "#/$defs/SaleMedian"
+                },
+                "type": "array"
+              },
+              "zone_id": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "zone_id",
+              "name",
+              "name_ar",
+              "communities",
+              "communities_ar",
+              "rent_contracts",
+              "sale_transactions",
+              "open_in_browser",
+              "rents",
+              "sales",
+              "method",
+              "provenance"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "retry_after_s": {
+            "type": [
+              "integer",
+              "null"
+            ]
+          },
+          "retryable": {
+            "type": "boolean"
+          }
+        },
+        "required": [
+          "code",
+          "message",
+          "retryable",
+          "retry_after_s"
+        ],
+        "type": "object"
+      },
+      "request_id": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "error",
+      "request_id"
+    ],
+    "type": "object"
+  }
+]
  5. Added

TDQS

B3.1/5.0
Behavior3/5

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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety profile is covered. The description adds genuinely useful provenance—'registered' medians and contract counts, not listings—which tells the agent the data is transactional rather than advertised. It says nothing about pagination behavior (cursor/page_size) or how results are ordered by default.

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 short sentences, front-loaded with the resource and the data type, with zero filler. The terseness is efficient, though it shades into under-specification given the ten-parameter surface.

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

Completeness2/5

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 need not be explained. But with 10 optional parameters at 0% schema coverage and a cursor-based pagination model, the description omits filtering semantics, the meaning of the sort enum, and the paging workflow—gaps the agent cannot recover from structured fields alone.

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

Parameters2/5

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

Schema description coverage is 0% across 10 parameters, so the description carries the full burden and largely fails it. It hints at area, annual/monthly, and contract counts, but never explains the q vs zone vs zone_id distinction, bedrooms, property_type, contract (new vs renewal), min_contracts, sort ordering, or cursor semantics—the most confusing parts of the call.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Names the resource (rent), the scope (a Dubai area), and the exact return content (registered annual/monthly medians and contract counts). The closing 'Not listings' distinguishes it from listing-style data and implicitly from housing_sales, though it never names that sibling directly.

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?

'Not listings' is a real exclusion, telling the agent this is registry/contract data rather than asking prices. However, there is no positive statement of when to pick this over housing_sales or costs_by_area, and no prerequisites or pagination workflow guidance.

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

All Brainy Prices — UAE Cost of Living toolsInspect
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