Brainy Prices — UAE Cost of Living

shopper_price_reports

Read-onlyIdempotent

Community price reports by product/store, with date and promos.

Input Schema

TableJSON Schema

Name	Required	Default
`area`	No
`sort`	No	-purchased_on
`cursor`	No
`store_id`	No
`page_size`	No
`product_id`	No
`purchased_since`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 13, 2026
- removedInput schema / $schema
```
Removed value: -"https://json-schema.org/draft/2020-12/schema"
```

Changed8 schema fields changedOct 6, 2026

removedInput schema / properties / sort / type
```
Removed value: -"string"
```

removedOutput schema / $defs / Links

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "docs": {
-      "type": "string"
-    },
-    "next": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "open_in_browser": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "self": {
-      "type": "string"
-    }
-  },
-  "required": [
-    "self",
-    "next",
-    "open_in_browser",
-    "docs"
-  ],
-  "type": "object"
-}

removedOutput schema / $defs / Provenance

Removed value: -{
-  "additionalProperties": true,
-  "required": [
-    "source_id",
-    "license_id",
-    "source_url",
-    "observed_on",
-    "observed_at",
-    "published_on",
-    "published_at",
-    "retrieved_at",
-    "stale",
-    "status",
-    "paused_since",
-    "flags"
-  ],
-  "type": "object"
-}

removedOutput schema / $defs / ResponseMeta

Removed value: -{
-  "additionalProperties": true,
-  "required": [
-    "api_version",
-    "content_language",
-    "generated_at",
-    "currency",
-    "attribution",
-    "disclaimer",
-    "dataset",
-    "page"
-  ],
-  "type": "object"
-}

removedOutput schema / $defs / ShopperReport

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "moderation_status": {
-      "const": "accepted"
-    },
-    "product_id": {
-      "type": "string"
-    },
-    "promo": {
-      "type": "boolean"
-    },
-    "provenance": {
-      "$ref": "#/$defs/Provenance"
-    },
-    "purchased_on": {
-      "type": "string"
-    },
-    "report_id": {
-      "type": "string"
-    },
-    "store_id": {
-      "type": "string"
-    },
-    "unit_price_aed": {
-      "type": "number"
-    }
-  },
-  "required": [
-    "report_id",
-    "product_id",
-    "store_id",
-    "purchased_on",
-    "unit_price_aed",
-    "promo",
-    "moderation_status",
-    "provenance"
-  ],
-  "type": "object"
-}

removedOutput schema / $defs / ShopperReportListResponse

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "data": {
-      "items": {
-        "$ref": "#/$defs/ShopperReport"
-      },
-      "type": "array"
-    },
-    "links": {
-      "$ref": "#/$defs/Links"
-    },
-    "meta": {
-      "$ref": "#/$defs/ResponseMeta"
-    }
-  },
-  "required": [
-    "meta",
-    "data",
-    "links"
-  ],
-  "type": "object"
-}

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/ShopperReportListResponse"
-  },
-  {
-    "$ref": "#/$defs/ToolFailure"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "moderation_status": {
+              "const": "accepted"
+            },
+            "product_id": {
+              "type": "string"
+            },
+            "promo": {
+              "type": "boolean"
+            },
+            "provenance": {
+              "additionalProperties": true,
+              "required": [
+                "source_id",
+                "license_id",
+                "source_url",
+                "observed_on",
+                "observed_at",
+                "published_on",
+                "published_at",
+                "retrieved_at",
+                "stale",
+                "status",
+                "paused_since",
+                "flags"
+              ],
+              "type": "object"
+            },
+            "purchased_on": {
+              "type": "string"
+            },
+            "report_id": {
+              "type": "string"
+            },
+            "store_id": {
+              "type": "string"
+            },
+            "unit_price_aed": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "report_id",
+            "product_id",
+            "store_id",
+            "purchased_on",
+            "unit_price_aed",
+            "promo",
+            "moderation_status",
+            "provenance"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "links": {
+        "additionalProperties": false,
+        "properties": {
+          "docs": {
+            "type": "string"
+          },
+          "next": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "open_in_browser": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "self": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "self",
+          "next",
+          "open_in_browser",
+          "docs"
+        ],
+        "type": "object"
+      },
+      "meta": {
+        "additionalProperties": true,
+        "required": [
+          "api_version",
+          "content_language",
+          "generated_at",
+          "currency",
+          "attribution",
+          "disclaimer",
+          "dataset",
+          "page"
+        ],
+        "type": "object"
+      }
+    },
+    "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"
+  }
+]

AddedOct 4, 2026

TDQS

C2.9/5.0

Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and a closed world, so the safety profile is covered. The description adds one genuinely useful behavioral signal beyond that: the reports are 'community' sourced (i.e. user-submitted data of uncertain quality) and carry promo context. It says nothing about pagination behavior, though a cursor parameter exists.

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?

A single front-loaded sentence with no filler or redundancy. It is efficient, though its brevity is partly under-specification rather than disciplined concision.

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?

For a seven-parameter, cursor-paginated query tool, the description omits how filtering, sorting, and paging interact. The existing output schema excuses it from describing return values, but the input surface and the crowd-sourced data caveat are not adequately covered.

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 seven parameters, so the description carries the full explanatory burden and largely fails it. It loosely hints at product/store and date filtering (product_id, store_id, purchased_since) but never explains area, sort semantics, cursor pagination, or page_size limits, and 'promos' is not even a parameter.

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?

The description names the resource precisely ('Community price reports') and its dimensions ('by product/store, with date and promos'), so an agent knows this returns crowd-sourced pricing observations rather than a catalog. It does not, however, contrast itself with nearby siblings like grocery_products, grocery_stores, or grocery_compare_list, so differentiation is only partial.

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

Usage Guidelines2/5

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

There is no explicit statement of when to reach for this tool versus grocery_compare_list or ministry_shop_prices, nor any prerequisite or exclusion guidance. Usage is only inferable from the resource noun, which leaves the agent to guess at routing.

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

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