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Ship24 Tracking

by com.ship24
OverviewDiscussionsAdmin

Get Couriers

get_couriers
Read-only

Returns the list of all couriers supported by Ship24, including their unique courier codes, human-readable names, and any special tracking requirements. Use this tool to discover valid courierCode values before creating or updating trackers, or to help identify which courier handles a particular tracking number format. Note: this endpoint has a rate limit of 1 request/second; cache results when possible.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
couriersYesAll couriers supported by Ship24.

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": {},
+  "properties": {
+    "couriers": {
+      "anyOf": [
+        {
+          "items": {
+            "additionalProperties": {},
+            "properties": {
+              "countryCode": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "Main country the courier operates in (ISO alpha-2)."
+              },
+              "courierCode": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "Value to pass as courierCode when creating or updating a tracker."
+              },
+              "courierName": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "Human-readable courier name."
+              },
+              "isDeprecated": {
+                "anyOf": [
+                  {
+                    "type": "boolean"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "True when the courier code is deprecated."
+              },
+              "isPost": {
+                "anyOf": [
+                  {
+                    "type": "boolean"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "True when the courier is a national postal operator."
+              },
+              "requiredFields": {
+                "anyOf": [
+                  {
+                    "items": {
+                      "type": "string"
+                    },
+                    "type": "array"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "Extra tracker fields this courier needs for optimal results: destinationPostCode, destinationCountryCode, courierAccount."
+              },
+              "website": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ],
+                "description": "The courier public website."
+              }
+            },
+            "type": "object"
+          },
+          "type": "array"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "All couriers supported by Ship24."
+    }
+  },
+  "required": [
+    "couriers"
+  ],
+  "type": "object"
+}
  2. First observed

TDQS

A4.7/5.0
Behavior5/5

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

Beyond the readOnlyHint annotation, the description adds meaningful behavioral context: the endpoint has a 1 request/second rate limit and results should be cached. It also tells the agent what data is included, which helps set expectations for the response.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences with no wasted words: the return value is stated first, then use cases, then a critical rate-limit warning. Every sentence adds value and the most important operational detail is clearly flagged.

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

Completeness5/5

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

For a zero-parameter read-only tool with an output schema already present, the description is complete. It covers what the tool returns, when to use it, and an important rate-limit constraint. Nothing essential is missing.

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

Parameters4/5

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

The tool has zero parameters, so there is no parameter documentation burden on the description. The baseline for a zero-parameter tool is 4, and the description appropriately focuses on output and usage rather than parameters.

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

Purpose5/5

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

The description clearly states the tool returns the list of all supported couriers with courier codes, human-readable names, and special tracking requirements. This is a specific verb-plus-resource statement that is easily distinguished from sibling tools like create_tracker or get_tracking_results.

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

Usage Guidelines4/5

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

The description provides clear context for when to use the tool: before creating or updating trackers to discover valid courierCode values, and to identify which courier handles a tracking number format. It does not explicitly name alternatives or exclusion conditions, so it stops short of a 5.

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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