Guild Wars 2

Wvw Matches

wvw_matches

Read-onlyIdempotent

Current WvW matches.

Input Schema

Name	Required	Description	Default
`world`	No

Output Schema

Name	Required	Description	Default
`id`	No
`maps`	No
`kills`	No
`deaths`	No
`scores`	No
`worlds`	No
`end_time`	No
`all_worlds`	No
`skirmishes`	No
`start_time`	No
`victory_points`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed13 schema fields changedSep 27, 2026

addedOutput schema / properties / all_worlds

Added value: +{
+  "properties": {
+    "blue": {
+      "items": {
+        "type": "number"
+      },
+      "type": "array"
+    },
+    "green": {
+      "items": {
+        "type": "number"
+      },
+      "type": "array"
+    },
+    "red": {
+      "items": {
+        "type": "number"
+      },
+      "type": "array"
+    }
+  },
+  "type": "object"
+}

removedOutput schema / properties / count

Removed value: -{
-  "description": "Number of items returned.",
-  "type": "number"
-}

addedOutput schema / properties / deaths

Added value: +{
+  "properties": {
+    "blue": {
+      "type": "number"
+    },
+    "green": {
+      "type": "number"
+    },
+    "red": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / end_time
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / id
```
Added value: +{
+  "type": "string"
+}
```

removedOutput schema / properties / items

Removed value: -{
-  "description": "Current WvW matches",
-  "items": {
-    "type": "string"
-  },
-  "type": "array"
-}

addedOutput schema / properties / kills

Added value: +{
+  "properties": {
+    "blue": {
+      "type": "number"
+    },
+    "green": {
+      "type": "number"
+    },
+    "red": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / maps

Added value: +{
+  "items": {
+    "properties": {
+      "bonuses": {
+        "items": {
+          "properties": {
+            "owner": {
+              "type": "string"
+            },
+            "type": {
+              "type": "string"
+            }
+          },
+          "type": [
+            null,
+            "object"
+          ]
+        },
+        "type": "array"
+      },
+      "deaths": {
+        "properties": {
+          "blue": {
+            "type": "number"
+          },
+          "green": {
+            "type": "number"
+          },
+          "red": {
+            "type": "number"
+          }
+        },
+        "type": "object"
+      },
+      "id": {
+        "type": "number"
+      },
+      "kills": {
+        "properties": {
+          "blue": {
+            "type": "number"
+          },
+          "green": {
+            "type": "number"
+          },
+          "red": {
+            "type": "number"
+          }
+        },
+        "type": "object"
+      },
+      "objectives": {
+        "items": {
+          "properties": {
+            "claimed_at": {
+              "type": [
+                "null",
+                "string"
+              ]
+            },
+            "claimed_by": {
+              "type": [
+                "null",
+                "string"
+              ]
+            },
+            "guild_upgrades": {
+              "items": {
+                "type": [
+                  null,
+                  "number"
+                ]
+              },
+              "type": "array"
+            },
+            "id": {
+              "type": "string"
+            },
+            "last_flipped": {
+              "type": "string"
+            },
+            "owner": {
+              "type": "string"
+            },
+            "points_capture": {
+              "type": "number"
+            },
+            "points_tick": {
+              "type": "number"
+            },
+            "type": {
+              "type": "string"
+            },
+            "yaks_delivered": {
+              "type": "number"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "scores": {
+        "properties": {
+          "blue": {
+            "type": "number"
+          },
+          "green": {
+            "type": "number"
+          },
+          "red": {
+            "type": "number"
+          }
+        },
+        "type": "object"
+      },
+      "type": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / scores

Added value: +{
+  "properties": {
+    "blue": {
+      "type": "number"
+    },
+    "green": {
+      "type": "number"
+    },
+    "red": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / skirmishes

Added value: +{
+  "items": {
+    "properties": {
+      "id": {
+        "type": "number"
+      },
+      "map_scores": {
+        "items": {
+          "properties": {
+            "scores": {
+              "properties": {
+                "blue": {
+                  "type": "number"
+                },
+                "green": {
+                  "type": "number"
+                },
+                "red": {
+                  "type": "number"
+                }
+              },
+              "type": "object"
+            },
+            "type": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "scores": {
+        "properties": {
+          "blue": {
+            "type": "number"
+          },
+          "green": {
+            "type": "number"
+          },
+          "red": {
+            "type": "number"
+          }
+        },
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / start_time
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / victory_points

Added value: +{
+  "properties": {
+    "blue": {
+      "type": "number"
+    },
+    "green": {
+      "type": "number"
+    },
+    "red": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / worlds

Added value: +{
+  "properties": {
+    "blue": {
+      "type": "number"
+    },
+    "green": {
+      "type": "number"
+    },
+    "red": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

Changed4 schema fields changedJun 2, 2026

changedOutput schema / properties / count / type

Previous value: -"integer"New value: +"number"

removedOutput schema / properties / items / items / properties

Removed value: -{
-  "all_worlds": {
-    "properties": {
-      "blue": {
-        "description": "Blue world IDs",
-        "items": {
-          "type": "number"
-        },
-        "type": "array"
-      },
-      "green": {
-        "description": "Green world IDs",
-        "items": {
-          "type": "number"
-        },
-        "type": "array"
-      },
-      "red": {
-        "description": "Red world IDs",
-        "items": {
-          "type": "number"
-        },
-        "type": "array"
-      }
-    },
-    "type": "object"
-  },
-  "id": {
-    "description": "Match ID",
-    "type": "string"
-  },
-  "scores": {
-    "properties": {
-      "blue": {
-        "description": "Blue team score",
-        "type": "number"
-      },
-      "green": {
-        "description": "Green team score",
-        "type": "number"
-      },
-      "red": {
-        "description": "Red team score",
-        "type": "number"
-      }
-    },
-    "type": "object"
-  },
-  "worlds": {
-    "properties": {
-      "blue": {
-        "description": "Blue world ID",
-        "type": "number"
-      },
-      "green": {
-        "description": "Green world ID",
-        "type": "number"
-      },
-      "red": {
-        "description": "Red world ID",
-        "type": "number"
-      }
-    },
-    "type": "object"
-  }
-}

changedOutput schema / properties / items / items / type
```
Previous value: -"object"New value: +"string"
```

removedOutput schema / required

Removed value: -[
-  "items",
-  "count"
-]

Changed2 schema fields changedMay 27, 2026

addedInput schema / examples

Added value: +[
+  {
+    "world": 1013
+  }
+]

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "count": {
+      "description": "Number of items returned.",
+      "type": "integer"
+    },
+    "items": {
+      "description": "Current WvW matches",
+      "items": {
+        "properties": {
+          "all_worlds": {
+            "properties": {
+              "blue": {
+                "description": "Blue world IDs",
+                "items": {
+                  "type": "number"
+                },
+                "type": "array"
+              },
+              "green": {
+                "description": "Green world IDs",
+                "items": {
+                  "type": "number"
+                },
+                "type": "array"
+              },
+              "red": {
+                "description": "Red world IDs",
+                "items": {
+                  "type": "number"
+                },
+                "type": "array"
+              }
+            },
+            "type": "object"
+          },
+          "id": {
+            "description": "Match ID",
+            "type": "string"
+          },
+          "scores": {
+            "properties": {
+              "blue": {
+                "description": "Blue team score",
+                "type": "number"
+              },
+              "green": {
+                "description": "Green team score",
+                "type": "number"
+              },
+              "red": {
+                "description": "Red team score",
+                "type": "number"
+              }
+            },
+            "type": "object"
+          },
+          "worlds": {
+            "properties": {
+              "blue": {
+                "description": "Blue world ID",
+                "type": "number"
+              },
+              "green": {
+                "description": "Green world ID",
+                "type": "number"
+              },
+              "red": {
+                "description": "Red world ID",
+                "type": "number"
+              }
+            },
+            "type": "object"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "items",
+    "count"
+  ],
+  "type": "object"
+}

First observedMay 20, 2026

TDQS

C2.1/5.0

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 known. However, the description adds no behavioral context such as whether the tool returns all matches, requires a world filter, or how it behaves when no world is provided.

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

Conciseness3/5

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

The description is extremely short with no wasted words, which is concise. However, it is a fragment rather than a complete sentence and lacks structure or explanatory power, making it more under-specified than genuinely helpful.

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 tool with one optional parameter and no parameter description, the definition is incomplete. The output schema exists, but the agent still cannot confidently decide whether to pass 'world' and what the expected semantics are.

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 compensate for the under-documented 'world' parameter. The description does not explain what 'world' means, whether it is optional, or what values are valid; only the schema's property name and an example (1013) provide any hint.

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

Purpose2/5

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

The description 'Current WvW matches.' is a noun phrase that essentially restates the tool name 'Wvw Matches' with the word 'Current' added. It lacks a verb like 'get' or 'list' and does not clearly distinguish the tool from the sibling 'worlds' tool.

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?

The description provides no guidance on when to use this tool versus alternatives. There is no mention of exclusions, conditions, or alternative tools, even though sibling tools like 'worlds' exist and have overlapping concepts.

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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