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List offers

list_offers
Read-only

Current storefront promotions (percentage/fixed discounts and free gifts), optionally grouped by brand or category. Also points at the /offers page.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
localeNoStorefront locale such as en-GB (default), en-US, de, fr-FR, es-ES, it-IT, nl-NL, pl. Controls product names, slugs and prices.
group_byNoGrouping (default all).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
groupsNoWith group_by brand or category.
offersNoWith group_by all (the default).
offers_urlYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "groups": {
+      "description": "With group_by brand or category.",
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "group": {
+            "type": "string"
+          },
+          "promotions": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "brands": {
+                  "items": {
+                    "type": "string"
+                  },
+                  "type": "array"
+                },
+                "description": {
+                  "anyOf": [
+                    {
+                      "type": "string"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ]
+                },
+                "discount_value": {
+                  "anyOf": [
+                    {
+                      "type": "number"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ],
+                  "description": "Percent or amount off, depending on type."
+                },
+                "ends_at": {
+                  "anyOf": [
+                    {
+                      "type": "string"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ]
+                },
+                "free_gift": {
+                  "anyOf": [
+                    {
+                      "additionalProperties": false,
+                      "properties": {
+                        "name": {
+                          "type": "string"
+                        },
+                        "sku": {
+                          "type": "string"
+                        }
+                      },
+                      "required": [
+                        "sku",
+                        "name"
+                      ],
+                      "type": "object"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ]
+                },
+                "id": {
+                  "type": "number"
+                },
+                "name": {
+                  "type": "string"
+                },
+                "scope": {
+                  "type": "string"
+                },
+                "terms_url": {
+                  "anyOf": [
+                    {
+                      "type": "string"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ]
+                },
+                "type": {
+                  "description": "percentage_discount, fixed_discount or free_gift.",
+                  "type": "string"
+                }
+              },
+              "required": [
+                "id",
+                "name",
+                "description",
+                "type",
+                "discount_value",
+                "ends_at",
+                "scope",
+                "brands",
+                "free_gift",
+                "terms_url"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          }
+        },
+        "required": [
+          "group",
+          "promotions"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "offers": {
+      "description": "With group_by all (the default).",
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "brands": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "description": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "discount_value": {
+            "anyOf": [
+              {
+                "type": "number"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "Percent or amount off, depending on type."
+          },
+          "ends_at": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "free_gift": {
+            "anyOf": [
+              {
+                "additionalProperties": false,
+                "properties": {
+                  "name": {
+                    "type": "string"
+                  },
+                  "sku": {
+                    "type": "string"
+                  }
+                },
+                "required": [
+                  "sku",
+                  "name"
+                ],
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "id": {
+            "type": "number"
+          },
+          "name": {
+            "type": "string"
+          },
+          "scope": {
+            "type": "string"
+          },
+          "terms_url": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "type": {
+            "description": "percentage_discount, fixed_discount or free_gift.",
+            "type": "string"
+          }
+        },
+        "required": [
+          "id",
+          "name",
+          "description",
+          "type",
+          "discount_value",
+          "ends_at",
+          "scope",
+          "brands",
+          "free_gift",
+          "terms_url"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "offers_url": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "offers_url"
+  ],
+  "type": "object"
+}
  2. First observed

TDQS

A3.5/5.0
Behavior3/5

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

The annotations already declare readOnlyHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds that results are current and can be grouped, but does not disclose return behavior such as pagination, ordering, or data freshness beyond 'current'.

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?

The description is brief and front-loads the main purpose. The first sentence is information-dense; the second sentence about the /offers page is a minor extra that does not support invocation but is not verbose.

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

Completeness4/5

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

For a simple read-only list tool with an output schema, no required parameters, and strong annotations, the description is mostly sufficient. The main gap is not explicitly differentiating it from the cart- and product-promotion siblings, which would help an agent choose correctly.

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 the parameters locale and group_by are already documented. The description's 'grouped by brand or category' echoes the group_by enum values without adding meaningful new semantics, and locale is not mentioned in the description.

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 states a specific verb and resource: it lists current storefront promotions, including the types of promotions covered and optional grouping. It does not explicitly contrast with sibling tools like get_cart_promotions or get_product_promotions, though 'storefront' narrows the scope.

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?

The intended use is implied by 'current storefront promotions', suggesting this is for site-level offers rather than cart- or product-specific ones. However, it does not explicitly state when to choose this tool over sibling promotions tools or mention any exclusions.

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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