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Brainy Prices — UAE Cost of Living

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grocery_stores

Read-onlyIdempotent

Grocery stores: delivery fees, free-delivery thresholds, minimum orders.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sortNoname
cursorNo
store_idNo
page_sizeNo
delivery_rule_statusNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • removedInput schema / $schema
      Removed value: -"https://json-schema.org/draft/2020-12/schema"
  2. Changed15 schema fields changed
    • removedInput schema / properties / delivery_rule_status / type
      Removed value: -"string"
    • removedInput schema / properties / sort / type
      Removed value: -"string"
    • removedOutput schema / $defs / DeliveryRule
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "checked_at": {
-      "anyOf": [
-        {
-          "type": "string"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "fee_max_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "fee_min_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "free_from_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "free_from_inclusive": {
-      "type": "boolean"
-    },
-    "minimum_order_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "notes": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "possibly_free_from_aed": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "possibly_free_from_inclusive": {
-      "type": [
-        "boolean",
-        "null"
-      ]
-    },
-    "scope": {
-      "type": "string"
-    },
-    "source_url": {
-      "type": [
-        "string",
-        "null"
-      ]
-    }
-  },
-  "required": [
-    "scope",
-    "fee_min_aed",
-    "fee_max_aed",
-    "free_from_aed",
-    "free_from_inclusive",
-    "possibly_free_from_aed",
-    "possibly_free_from_inclusive",
-    "minimum_order_aed",
-    "notes",
-    "source_url",
-    "checked_at"
-  ],
-  "type": "object"
-}
    • changedOutput schema / $defs / GroceryStore / properties / delivery_rule / anyOf
      Previous value: -[
-  {
-    "$ref": "#/$defs/DeliveryRule"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "checked_at": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "fee_max_aed": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "fee_min_aed": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "free_from_aed": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "free_from_inclusive": {
+        "type": "boolean"
+      },
+      "minimum_order_aed": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "notes": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "possibly_free_from_aed": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "possibly_free_from_inclusive": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "scope": {
+        "type": "string"
+      },
+      "source_url": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "required": [
+      "scope",
+      "fee_min_aed",
+      "fee_max_aed",
+      "free_from_aed",
+      "free_from_inclusive",
+      "possibly_free_from_aed",
+      "possibly_free_from_inclusive",
+      "minimum_order_aed",
+      "notes",
+      "source_url",
+      "checked_at"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • removedOutput schema / $defs / GroceryStore / properties / delivery_rule_status / type
      Removed value: -"string"
    • removedOutput schema / $defs / GroceryStore / properties / kind / type
      Removed value: -"string"
    • removedOutput schema / $defs / GroceryStore / properties / provenance / $ref
      Removed value: -"#/$defs/Provenance"
    • addedOutput schema / $defs / GroceryStore / properties / provenance / additionalProperties
      Added value: +true
    • addedOutput schema / $defs / GroceryStore / properties / provenance / required
      Added value: +[
+  "source_id",
+  "license_id",
+  "source_url",
+  "observed_on",
+  "observed_at",
+  "published_on",
+  "published_at",
+  "retrieved_at",
+  "stale",
+  "status",
+  "paused_since",
+  "flags"
+]
    • addedOutput schema / $defs / GroceryStore / properties / provenance / type
      Added value: +"object"
    • removedOutput schema / $defs / GroceryStoreListResponse
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "data": {
-      "items": {
-        "$ref": "#/$defs/GroceryStore"
-      },
-      "type": "array"
-    },
-    "links": {
-      "$ref": "#/$defs/Links"
-    },
-    "meta": {
-      "$ref": "#/$defs/ResponseMeta"
-    }
-  },
-  "required": [
-    "meta",
-    "data",
-    "links"
-  ],
-  "type": "object"
-}
    • removedOutput schema / $defs / GroceryStoreResponse
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "data": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/GroceryStore"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "links": {
-      "$ref": "#/$defs/Links"
-    },
-    "meta": {
-      "$ref": "#/$defs/ResponseMeta"
-    }
-  },
-  "required": [
-    "meta",
-    "data",
-    "links"
-  ],
-  "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 / $defs / ToolFailure
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "error": {
-      "additionalProperties": false,
-      "properties": {
-        "code": {
-          "type": "string"
-        },
-        "message": {
-          "type": "string"
-        },
-        "retry_after_s": {
-          "type": [
-            "integer",
-            "null"
-          ]
-        },
-        "retryable": {
-          "type": "boolean"
-        }
-      },
-      "required": [
-        "code",
-        "message",
-        "retryable",
-        "retry_after_s"
-      ],
-      "type": "object"
-    },
-    "request_id": {
-      "type": [
-        "string",
-        "null"
-      ]
-    }
-  },
-  "required": [
-    "error",
-    "request_id"
-  ],
-  "type": "object"
-}
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "$ref": "#/$defs/GroceryStoreListResponse"
-  },
-  {
-    "$ref": "#/$defs/GroceryStoreResponse"
-  },
-  {
-    "$ref": "#/$defs/ToolFailure"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "items": {
+          "$ref": "#/$defs/GroceryStore"
+        },
+        "type": "array"
+      },
+      "links": {
+        "$ref": "#/$defs/Links"
+      },
+      "meta": {
+        "$ref": "#/$defs/ResponseMeta"
+      }
+    },
+    "required": [
+      "meta",
+      "data",
+      "links"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "data": {
+        "anyOf": [
+          {
+            "$ref": "#/$defs/GroceryStore"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "links": {
+        "$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"
+  }
+]
  3. Added

TDQS

C2.4/5.0
Behavior2/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds no behavioral context beyond the field list – nothing about pagination via cursor/page_size, how results are ordered, or what filtering semantics apply.

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 short sentence with no filler and the key data points front-loaded. It is efficient, though its brevity shades into under-specification rather than crispness.

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?

With five parameters at 0% schema coverage and no annotations gap to lean on, the description should explain filtering, ordering, and pagination. An output schema exists so return values need not be described, but the input side is essentially unexplained.

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%, so the description must carry the burden, but it never mentions sort, cursor, store_id, page_size, or delivery_rule_status. Only a loose thematic link exists between 'delivery' phrasing and the delivery_rule_status enum, leaving all five parameters effectively undocumented.

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

Purpose3/5

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

The description names the resource (grocery stores) and the data it carries (delivery fees, thresholds, minimums), so the domain is identifiable, but it uses a bare noun phrase with no verb stating what the tool actually does (list? search? compare?). It also does nothing to separate itself from siblings like grocery_compare_list or grocery_products, which plausibly overlap.

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 when-to-use guidance, no prerequisites, and no mention of any alternative tool. An agent must guess whether this is the right sibling among grocery_products, grocery_compare_list, and ministry_shop_prices.

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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