Foxfind

compare_prices

Read-only

Compare prices for a game by region. Returns cheapest store, sorted offers, and links to support developer (direct purchase).

Input Schema

Name	Required	Description	Default
`title`	Yes	Exact game title to compare (e.g. "Hades II"). Must be 2-150 characters.
`country`	No	Two-letter country code for regional pricing (default: "CA"). Supported: CA, US, GB, AU, DE, FR.

Output Schema

Name	Required	Description	Default
`slug`	No
`type`	No
`title`	Yes
`gameId`	No
`offers`	No
`country`	Yes
`cheapest`	Yes
`currency`	Yes
`products`	No
`comparable`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedOct 15, 2026

changedOutput schema / properties / cheapest / anyOf

Previous value: -[
-  {
-    "properties": {
-      "coupon": {
-        "properties": {
-          "code": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "code"
-        ],
-        "type": "object"
-      },
-      "currency": {
-        "type": "string"
-      },
-      "price": {
-        "type": "number"
-      },
-      "store": {
-        "type": "string"
-      },
-      "url": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "store",
-      "price",
-      "currency",
-      "url"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "properties": {
+      "coupon": {
+        "properties": {
+          "code": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code"
+        ],
+        "type": "object"
+      },
+      "currency": {
+        "type": "string"
+      },
+      "price": {
+        "type": "number"
+      },
+      "promotions": {
+        "items": {
+          "properties": {
+            "code": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "endsAt": {
+              "type": "number"
+            },
+            "id": {
+              "type": "string"
+            },
+            "startsAt": {
+              "type": "number"
+            },
+            "terms": {
+              "type": "string"
+            },
+            "title": {
+              "type": "string"
+            },
+            "validUntil": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "id",
+            "title",
+            "terms",
+            "startsAt",
+            "endsAt"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "store": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "store",
+      "price",
+      "currency",
+      "url"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / offers / items / properties / promotions

Added value: +{
+  "items": {
+    "properties": {
+      "code": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "endsAt": {
+        "type": "number"
+      },
+      "id": {
+        "type": "string"
+      },
+      "startsAt": {
+        "type": "number"
+      },
+      "terms": {
+        "type": "string"
+      },
+      "title": {
+        "type": "string"
+      },
+      "validUntil": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "id",
+      "title",
+      "terms",
+      "startsAt",
+      "endsAt"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

changedOutput schema / properties / products / items / properties / cheapest / anyOf

Previous value: -[
-  {
-    "properties": {
-      "coupon": {
-        "properties": {
-          "code": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "code"
-        ],
-        "type": "object"
-      },
-      "currency": {
-        "type": "string"
-      },
-      "price": {
-        "type": "number"
-      },
-      "store": {
-        "type": "string"
-      },
-      "url": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "store",
-      "price",
-      "currency",
-      "url"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "properties": {
+      "coupon": {
+        "properties": {
+          "code": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code"
+        ],
+        "type": "object"
+      },
+      "currency": {
+        "type": "string"
+      },
+      "price": {
+        "type": "number"
+      },
+      "promotions": {
+        "items": {
+          "properties": {
+            "code": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "endsAt": {
+              "type": "number"
+            },
+            "id": {
+              "type": "string"
+            },
+            "startsAt": {
+              "type": "number"
+            },
+            "terms": {
+              "type": "string"
+            },
+            "title": {
+              "type": "string"
+            },
+            "validUntil": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "id",
+            "title",
+            "terms",
+            "startsAt",
+            "endsAt"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "store": {
+        "type": "string"
+      },
+      "url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "store",
+      "price",
+      "currency",
+      "url"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

addedOutput schema / properties / products / items / properties / offers / items / properties / promotions

Added value: +{
+  "items": {
+    "properties": {
+      "code": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "endsAt": {
+        "type": "number"
+      },
+      "id": {
+        "type": "string"
+      },
+      "startsAt": {
+        "type": "number"
+      },
+      "terms": {
+        "type": "string"
+      },
+      "title": {
+        "type": "string"
+      },
+      "validUntil": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "id",
+      "title",
+      "terms",
+      "startsAt",
+      "endsAt"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

First observedOct 13, 2026

TDQS

B3.2/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds useful behavior detail not in the annotations: it returns the cheapest store, sorted offers, and direct-purchase links. With an output schema present, most of the return-value disclosure is redundant, so this is a modest addition rather than a rich one.

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 with the core action front-loaded and no filler. The parenthetical '(direct purchase)' is the only slightly muddled fragment, keeping it from a 5.

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?

For a two-parameter, read-only tool with full schema coverage and an output schema, the return-value contract is already carried by structured fields. What is missing is routing information versus its three siblings, which is the main gap an agent would face when choosing this tool.

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

Parameters3/5

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

Schema description coverage is 100%, so both parameters (title and country, with its enum and default) are fully documented in the schema. The description's 'by region' phrasing adds only a loose conceptual mapping to the country parameter, no format or constraint detail beyond the schema. Baseline 3 applies.

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?

States a specific verb and resource (compare prices for a game) and the scoping dimension (by region), which is enough to know what the tool does. It does not, however, distinguish itself from siblings like find_deals or search_games, and the trailing phrase 'links to support developer (direct purchase)' is ambiguous about what is actually returned.

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 statement and no reference to the sibling tools that could serve as alternatives (find_deals, get_game, search_games). The only usage signal is implicit: you must supply a game title and a region.

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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