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get_certificate_info

Read-onlyIdempotent

Retrieve certificate identity and available market data using an Avanza order-book ID from discovery. Use for certificate lookup and analysis; data may not be real-time.

Instructions

Get certificate identity and latest available market data, not guaranteed real-time.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`order_book_id`	Yes	Avanza order-book ID from discovery; not the separate instrumentId.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`isin`	No
`name`	Yes
`type`	No
`quote`	No
`listing`	No
`category`	No
`tradable`	No
`orderbookId`	Yes
`subCategory`	No
`assetCategory`	No
`keyIndicators`	No
`historicalClosingPrices`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed5 schema fields changedv2.1.0Sep 29, 2026

removedOutput schema / additionalProperties
```
Removed value: -true
```

changedOutput schema / properties / historicalClosingPrices / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "description": "Historical closing prices.",
-    "properties": {
-      "fiveYears": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "oneDay": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "oneMonth": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "oneWeek": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "oneYear": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "start": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "startOfYear": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "threeMonths": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "threeYears": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "description": "Historical closing prices.",
+    "properties": {
+      "fiveYears": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "oneDay": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "oneMonth": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "oneWeek": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "oneYear": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "start": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "startDate": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "startOfYear": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "threeMonths": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "threeYears": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / keyIndicators / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "description": "Stock key financial indicators.",
-    "properties": {
-      "beta": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "capitalTurnover": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "directYield": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "dividendsPerYear": {
-        "anyOf": [
-          {
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "earningsPerShare": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "description": "Share value information.",
-            "properties": {
-              "currency": {
-                "type": "string"
-              },
-              "value": {
-                "type": "number"
-              }
-            },
-            "required": [
-              "value",
-              "currency"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "equityPerShare": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "description": "Share value information.",
-            "properties": {
-              "currency": {
-                "type": "string"
-              },
-              "value": {
-                "type": "number"
-              }
-            },
-            "required": [
-              "value",
-              "currency"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "equityRatio": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "evEbitRatio": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "marketCapital": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "description": "Share value information.",
-            "properties": {
-              "currency": {
-                "type": "string"
-              },
-              "value": {
-                "type": "number"
-              }
-            },
-            "required": [
-              "value",
-              "currency"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "netMargin": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "nextReport": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "description": "Company report information.",
-            "properties": {
-              "date": {
-                "type": "string"
-              },
-              "reportType": {
-                "type": "string"
-              }
-            },
-            "required": [
-              "date",
-              "reportType"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "numberOfOwners": {
-        "anyOf": [
-          {
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "operatingProfitMargin": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "previousReport": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "description": "Company report information.",
-            "properties": {
-              "date": {
-                "type": "string"
-              },
-              "reportType": {
-                "type": "string"
-              }
-            },
-            "required": [
-              "date",
-              "reportType"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "priceEarningsRatio": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "priceSalesRatio": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "reportDate": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "returnOnEquity": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "returnOnTotalAssets": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "turnoverPerShare": {
-        "anyOf": [
-          {
-            "additionalProperties": true,
-            "description": "Share value information.",
-            "properties": {
-              "currency": {
-                "type": "string"
-              },
-              "value": {
-                "type": "number"
-              }
-            },
-            "required": [
-              "value",
-              "currency"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "volatility": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "description": "Stock key financial indicators.",
+    "properties": {
+      "beta": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "capitalTurnover": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "directYield": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "dividendsPerYear": {
+        "anyOf": [
+          {
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "earningsPerShare": {
+        "anyOf": [
+          {
+            "description": "Share value information.",
+            "properties": {
+              "currency": {
+                "type": "string"
+              },
+              "value": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "value",
+              "currency"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "equityPerShare": {
+        "anyOf": [
+          {
+            "description": "Share value information.",
+            "properties": {
+              "currency": {
+                "type": "string"
+              },
+              "value": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "value",
+              "currency"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "equityRatio": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "evEbitRatio": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "marketCapital": {
+        "anyOf": [
+          {
+            "description": "Share value information.",
+            "properties": {
+              "currency": {
+                "type": "string"
+              },
+              "value": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "value",
+              "currency"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "netMargin": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "nextReport": {
+        "anyOf": [
+          {
+            "description": "Company report information.",
+            "properties": {
+              "date": {
+                "type": "string"
+              },
+              "reportType": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "date",
+              "reportType"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "numberOfOwners": {
+        "anyOf": [
+          {
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "operatingProfitMargin": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "previousReport": {
+        "anyOf": [
+          {
+            "description": "Company report information.",
+            "properties": {
+              "date": {
+                "type": "string"
+              },
+              "reportType": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "date",
+              "reportType"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "priceEarningsRatio": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "priceSalesRatio": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "reportDate": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "returnOnEquity": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "returnOnTotalAssets": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "turnoverPerShare": {
+        "anyOf": [
+          {
+            "description": "Share value information.",
+            "properties": {
+              "currency": {
+                "type": "string"
+              },
+              "value": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "value",
+              "currency"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "volatility": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / listing / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "description": "Stock listing information.",
-    "properties": {
-      "countryCode": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "currency": {
-        "type": "string"
-      },
-      "marketPlaceCode": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "marketPlaceName": {
-        "type": "string"
-      },
-      "marketTradesAvailable": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "shortName": {
-        "type": "string"
-      },
-      "tickSizeListId": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "tickerSymbol": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      }
-    },
-    "required": [
-      "shortName",
-      "currency",
-      "marketPlaceName"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "description": "Stock listing information.",
+    "properties": {
+      "countryCode": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "currency": {
+        "type": "string"
+      },
+      "marketListName": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "marketPlaceCode": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "marketPlaceName": {
+        "type": "string"
+      },
+      "marketTradesAvailable": {
+        "anyOf": [
+          {
+            "type": "boolean"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "shortName": {
+        "type": "string"
+      },
+      "tickSizeListId": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "tickerSymbol": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      }
+    },
+    "required": [
+      "shortName",
+      "currency",
+      "marketPlaceName"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / quote / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "description": "Latest available stock quote data; inspect isRealTime and source timestamps.",
-    "properties": {
-      "buy": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "change": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "changePercent": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "highest": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "isRealTime": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "last": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "lowest": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "sell": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "spread": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "timeOfLast": {
-        "anyOf": [
-          {
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "totalValueTraded": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "totalVolumeTraded": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "updated": {
-        "anyOf": [
-          {
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      },
-      "volumeWeightedAveragePrice": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "default": null
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "description": "Latest available stock quote data; inspect isRealTime and source timestamps.",
+    "properties": {
+      "buy": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "change": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "changePercent": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "highest": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "isRealTime": {
+        "anyOf": [
+          {
+            "type": "boolean"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "last": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "lowest": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "sell": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "spread": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "timeOfLast": {
+        "anyOf": [
+          {
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "totalValueTraded": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "totalVolumeTraded": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "updated": {
+        "anyOf": [
+          {
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      },
+      "volumeWeightedAveragePrice": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "default": null
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

Addedv2.0.0Sep 15, 2026

TDQS

B3.4/5.0

Behavior4/5

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

Annotations already declare the full safety profile (readOnly, idempotent, non-destructive, openWorld), so the bar is lower. The description adds genuinely new context by warning that market data is 'not guaranteed real-time', a freshness caveat not derivable from structured fields.

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 tight sentence with the core identity purpose front-loaded and the freshness caveat trailing. No wasted words, though it is sparse enough that the tradeoff tips slightly toward under-specification.

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?

Output schema exists so return values need no explanation, and the single parameter is fully documented. The gaps are sibling differentiation and usage context, which the description does not cover.

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% and the order_book_id field is well documented, including the useful warning that it differs from instrumentId. The description adds nothing about the parameter, so the 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 clear verb ('Get') and resource ('certificate identity and latest available market data'), so an agent understands the payload. However, it does not distinguish itself from the sibling get_certificate_details or filter_certificates, leaving the info-vs-details split ambiguous.

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?

No when-to-use guidance and no alternative is named. With siblings like get_certificate_details and filter_certificates present, the description gives the agent no signal for choosing between them.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.