ThinAir Data

impact_analysis

Read-onlyIdempotent

Analyze the blast radius of a proposed schema change: FK dependencies, affected views, row count, risk score. [ARCHITECT tier]

Input Schema

Name	Required	Description	Default
`intent`	Yes	Describe the change: 'rename vehicle_id to vehicle_uuid on trips', 'drop column X'
`connection`	No	Target connection name from this tenant's inventory. Call `list_connections` to see every name + dialect, then match semantically to the user's intent (e.g. 'analytics' → a connection named `-analytics-`; 'prod' → a connection with `prod-` prefix). If the user didn't specify, use the tenant's default (first added). Do not invent names — resolve from `list_connections` output.

Output Schema

Name	Required	Description	Default
`data`	No
`meta`	No
`display`	No
`summary`	No
`insights`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed14 schema fields changedOct 31, 2026

removedInput schema / additionalProperties
```
Removed value: -false
```
changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +{}
```

changedOutput schema / properties / data / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "affected_views": {
-        "items": {},
-        "type": "array"
-      },
-      "analysis_scope": {
-        "enum": [
-          "table",
-          "column"
-        ],
-        "type": "string"
-      },
-      "dependency_risk": {
-        "type": "string"
-      },
-      "fk_dependencies": {
-        "items": {
-          "additionalProperties": true,
-          "properties": {
-            "column": {
-              "type": "string"
-            },
-            "direction": {
-              "type": "string"
-            },
-            "references": {
-              "type": "string"
-            },
-            "references_column": {
-              "type": "string"
-            },
-            "table": {
-              "type": "string"
-            }
-          },
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "fk_dependencies_evaluated": {
-        "type": "boolean"
-      },
-      "intent": {
-        "type": "string"
-      },
-      "operation_risk": {
-        "type": "string"
-      },
-      "recommendation": {
-        "type": "string"
-      },
-      "risk": {
-        "type": "string"
-      },
-      "row_count": {
-        "type": [
-          "number",
-          "string"
-        ]
-      },
-      "target": {
-        "additionalProperties": true,
-        "properties": {
-          "action": {
-            "type": "string"
-          },
-          "column": {
-            "type": "string"
-          },
-          "object_type": {
-            "type": "string"
-          },
-          "table": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      },
-      "target_table": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "target_table"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "code": {
-        "type": "string"
-      },
-      "details": {
-        "additionalProperties": {},
-        "type": "object"
-      },
-      "error": {
-        "type": "string"
-      },
-      "internal_code": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_after_s": {
-        "type": "number"
-      },
-      "retryable": {
-        "type": "boolean"
-      }
-    },
-    "required": [
-      "error"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "affected_views": {
+        "items": {},
+        "type": "array"
+      },
+      "analysis_scope": {
+        "enum": [
+          "table",
+          "column"
+        ],
+        "type": "string"
+      },
+      "dependency_risk": {
+        "type": "string"
+      },
+      "fk_dependencies": {
+        "items": {
+          "additionalProperties": {},
+          "properties": {
+            "column": {
+              "type": "string"
+            },
+            "direction": {
+              "type": "string"
+            },
+            "references": {
+              "type": "string"
+            },
+            "references_column": {
+              "type": "string"
+            },
+            "table": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "fk_dependencies_evaluated": {
+        "type": "boolean"
+      },
+      "intent": {
+        "type": "string"
+      },
+      "operation_risk": {
+        "type": "string"
+      },
+      "recommendation": {
+        "type": "string"
+      },
+      "risk": {
+        "type": "string"
+      },
+      "row_count": {
+        "type": [
+          "number",
+          "string"
+        ]
+      },
+      "target": {
+        "additionalProperties": {},
+        "properties": {
+          "action": {
+            "type": "string"
+          },
+          "column": {
+            "type": "string"
+          },
+          "object_type": {
+            "type": "string"
+          },
+          "table": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "target_table": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "target_table"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "propertyNames": {
+          "type": "string"
+        },
+        "type": "object"
+      },
+      "error": {
+        "type": "string"
+      },
+      "internal_code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "retry_after_s": {
+        "type": "number"
+      },
+      "retryable": {
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "error"
+    ],
+    "type": "object"
+  }
+]

changedOutput schema / properties / display / additionalProperties
```
Previous value: -trueNew value: +{}
```
changedOutput schema / properties / display / properties / chart / additionalProperties
```
Previous value: -trueNew value: +{}
```
changedOutput schema / properties / display / properties / code / additionalProperties
```
Previous value: -trueNew value: +{}
```
changedOutput schema / properties / display / properties / map / additionalProperties
```
Previous value: -trueNew value: +{}
```
changedOutput schema / properties / display / properties / metric / additionalProperties
```
Previous value: -trueNew value: +{}
```
changedOutput schema / properties / insights / items / additionalProperties
```
Previous value: -trueNew value: +{}
```
changedOutput schema / properties / meta / additionalProperties
```
Previous value: -trueNew value: +{}
```
removedOutput schema / properties / meta / properties / executionTimeMs / $ref
```
Removed value: -"#/properties/data/anyOf/0/properties/row_count"
```
addedOutput schema / properties / meta / properties / executionTimeMs / type
```
Added value: +[
+  "number",
+  "string"
+]
```
removedOutput schema / properties / meta / properties / rowCount / $ref
```
Removed value: -"#/properties/data/anyOf/0/properties/row_count"
```
addedOutput schema / properties / meta / properties / rowCount / type
```
Added value: +[
+  "number",
+  "string"
+]
```

Changed4 schema fields changedSep 30, 2026

changedOutput schema / properties / data / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "affected_views": {
-        "items": {},
-        "type": "array"
-      },
-      "analysis_scope": {
-        "enum": [
-          "table",
-          "column"
-        ],
-        "type": "string"
-      },
-      "dependency_risk": {
-        "type": "string"
-      },
-      "fk_dependencies": {
-        "items": {
-          "additionalProperties": true,
-          "properties": {
-            "column": {
-              "type": "string"
-            },
-            "direction": {
-              "type": "string"
-            },
-            "references": {
-              "type": "string"
-            },
-            "references_column": {
-              "type": "string"
-            },
-            "table": {
-              "type": "string"
-            }
-          },
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "fk_dependencies_evaluated": {
-        "type": "boolean"
-      },
-      "intent": {
-        "type": "string"
-      },
-      "operation_risk": {
-        "type": "string"
-      },
-      "recommendation": {
-        "type": "string"
-      },
-      "risk": {
-        "type": "string"
-      },
-      "row_count": {
-        "type": [
-          "number",
-          "string"
-        ]
-      },
-      "target": {
-        "additionalProperties": true,
-        "properties": {
-          "action": {
-            "type": "string"
-          },
-          "column": {
-            "type": "string"
-          },
-          "object_type": {
-            "type": "string"
-          },
-          "table": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      },
-      "target_table": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "target_table"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "code": {
-        "type": "string"
-      },
-      "details": {
-        "additionalProperties": {},
-        "type": "object"
-      },
-      "error": {
-        "type": "string"
-      },
-      "internal_code": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_after_s": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "error"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "affected_views": {
+        "items": {},
+        "type": "array"
+      },
+      "analysis_scope": {
+        "enum": [
+          "table",
+          "column"
+        ],
+        "type": "string"
+      },
+      "dependency_risk": {
+        "type": "string"
+      },
+      "fk_dependencies": {
+        "items": {
+          "additionalProperties": true,
+          "properties": {
+            "column": {
+              "type": "string"
+            },
+            "direction": {
+              "type": "string"
+            },
+            "references": {
+              "type": "string"
+            },
+            "references_column": {
+              "type": "string"
+            },
+            "table": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "fk_dependencies_evaluated": {
+        "type": "boolean"
+      },
+      "intent": {
+        "type": "string"
+      },
+      "operation_risk": {
+        "type": "string"
+      },
+      "recommendation": {
+        "type": "string"
+      },
+      "risk": {
+        "type": "string"
+      },
+      "row_count": {
+        "type": [
+          "number",
+          "string"
+        ]
+      },
+      "target": {
+        "additionalProperties": true,
+        "properties": {
+          "action": {
+            "type": "string"
+          },
+          "column": {
+            "type": "string"
+          },
+          "object_type": {
+            "type": "string"
+          },
+          "table": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "target_table": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "target_table"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "type": "object"
+      },
+      "error": {
+        "type": "string"
+      },
+      "internal_code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "retry_after_s": {
+        "type": "number"
+      },
+      "retryable": {
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "error"
+    ],
+    "type": "object"
+  }
+]

addedOutput schema / properties / meta / properties / maskedCells
```
Added value: +{
+  "type": "number"
+}
```

addedOutput schema / properties / meta / properties / maskedColumns

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / meta / properties / rowCapReached
```
Added value: +{
+  "type": "boolean"
+}
```

Changed1 schema field changedSep 15, 2026

changedOutput schema / properties / data / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "affected_views": {
-        "items": {},
-        "type": "array"
-      },
-      "analysis_scope": {
-        "enum": [
-          "table",
-          "column"
-        ],
-        "type": "string"
-      },
-      "dependency_risk": {
-        "type": "string"
-      },
-      "fk_dependencies": {
-        "items": {
-          "additionalProperties": true,
-          "properties": {
-            "column": {
-              "type": "string"
-            },
-            "direction": {
-              "type": "string"
-            },
-            "references": {
-              "type": "string"
-            },
-            "references_column": {
-              "type": "string"
-            },
-            "table": {
-              "type": "string"
-            }
-          },
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "fk_dependencies_evaluated": {
-        "type": "boolean"
-      },
-      "intent": {
-        "type": "string"
-      },
-      "operation_risk": {
-        "type": "string"
-      },
-      "recommendation": {
-        "type": "string"
-      },
-      "risk": {
-        "type": "string"
-      },
-      "row_count": {
-        "type": [
-          "number",
-          "string"
-        ]
-      },
-      "target": {
-        "additionalProperties": true,
-        "properties": {
-          "action": {
-            "type": "string"
-          },
-          "column": {
-            "type": "string"
-          },
-          "object_type": {
-            "type": "string"
-          },
-          "table": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      },
-      "target_table": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "target_table"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "code": {
-        "type": "string"
-      },
-      "details": {
-        "additionalProperties": {},
-        "type": "object"
-      },
-      "error": {
-        "type": "string"
-      },
-      "internal_code": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_after_s": {
-        "type": "number"
-      }
-    },
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "affected_views": {
+        "items": {},
+        "type": "array"
+      },
+      "analysis_scope": {
+        "enum": [
+          "table",
+          "column"
+        ],
+        "type": "string"
+      },
+      "dependency_risk": {
+        "type": "string"
+      },
+      "fk_dependencies": {
+        "items": {
+          "additionalProperties": true,
+          "properties": {
+            "column": {
+              "type": "string"
+            },
+            "direction": {
+              "type": "string"
+            },
+            "references": {
+              "type": "string"
+            },
+            "references_column": {
+              "type": "string"
+            },
+            "table": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "fk_dependencies_evaluated": {
+        "type": "boolean"
+      },
+      "intent": {
+        "type": "string"
+      },
+      "operation_risk": {
+        "type": "string"
+      },
+      "recommendation": {
+        "type": "string"
+      },
+      "risk": {
+        "type": "string"
+      },
+      "row_count": {
+        "type": [
+          "number",
+          "string"
+        ]
+      },
+      "target": {
+        "additionalProperties": true,
+        "properties": {
+          "action": {
+            "type": "string"
+          },
+          "column": {
+            "type": "string"
+          },
+          "object_type": {
+            "type": "string"
+          },
+          "table": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "target_table": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "target_table"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "type": "object"
+      },
+      "error": {
+        "type": "string"
+      },
+      "internal_code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "retry_after_s": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "error"
+    ],
+    "type": "object"
+  }
+]

Changed1 schema field changedSep 15, 2026

changedOutput schema / properties / data / anyOf

Previous value: -[
-  {
-    "additionalProperties": true,
-    "properties": {
-      "affected_views": {
-        "items": {},
-        "type": "array"
-      },
-      "fk_dependencies": {
-        "items": {
-          "additionalProperties": true,
-          "properties": {
-            "column": {
-              "type": "string"
-            },
-            "references": {
-              "type": "string"
-            },
-            "table": {
-              "type": "string"
-            }
-          },
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "intent": {
-        "type": "string"
-      },
-      "recommendation": {
-        "type": "string"
-      },
-      "risk": {
-        "type": "string"
-      },
-      "row_count": {
-        "type": [
-          "number",
-          "string"
-        ]
-      },
-      "target_table": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "target_table"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": true,
-    "properties": {
-      "code": {
-        "type": "string"
-      },
-      "details": {
-        "additionalProperties": {},
-        "type": "object"
-      },
-      "error": {
-        "type": "string"
-      },
-      "internal_code": {
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "retry_after_s": {
-        "type": "number"
-      }
-    },
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": true,
+    "properties": {
+      "affected_views": {
+        "items": {},
+        "type": "array"
+      },
+      "analysis_scope": {
+        "enum": [
+          "table",
+          "column"
+        ],
+        "type": "string"
+      },
+      "dependency_risk": {
+        "type": "string"
+      },
+      "fk_dependencies": {
+        "items": {
+          "additionalProperties": true,
+          "properties": {
+            "column": {
+              "type": "string"
+            },
+            "direction": {
+              "type": "string"
+            },
+            "references": {
+              "type": "string"
+            },
+            "references_column": {
+              "type": "string"
+            },
+            "table": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "fk_dependencies_evaluated": {
+        "type": "boolean"
+      },
+      "intent": {
+        "type": "string"
+      },
+      "operation_risk": {
+        "type": "string"
+      },
+      "recommendation": {
+        "type": "string"
+      },
+      "risk": {
+        "type": "string"
+      },
+      "row_count": {
+        "type": [
+          "number",
+          "string"
+        ]
+      },
+      "target": {
+        "additionalProperties": true,
+        "properties": {
+          "action": {
+            "type": "string"
+          },
+          "column": {
+            "type": "string"
+          },
+          "object_type": {
+            "type": "string"
+          },
+          "table": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "target_table": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "target_table"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": true,
+    "properties": {
+      "code": {
+        "type": "string"
+      },
+      "details": {
+        "additionalProperties": {},
+        "type": "object"
+      },
+      "error": {
+        "type": "string"
+      },
+      "internal_code": {
+        "type": "string"
+      },
+      "message": {
+        "type": "string"
+      },
+      "retry_after_s": {
+        "type": "number"
+      }
+    },
+    "type": "object"
+  }
+]

Changed3 schema fields changedAug 17, 2026

addedInput schema / properties / connection / maxLength
```
Added value: +256
```

changedInput schema / properties / intent / description

Previous value: -"Describe the change: 'rename customer_id to account_id', 'drop column X'"New value: +"Describe the change: 'rename vehicle_id to vehicle_uuid on trips', 'drop column X'"

addedInput schema / properties / intent / maxLength
```
Added value: +500
```

Changed2 schema fields changedMay 5, 2026

addedOutput schema / properties / display / properties / map

Added value: +{
+  "additionalProperties": true,
+  "properties": {
+    "label": {
+      "type": "string"
+    },
+    "lat": {
+      "type": "string"
+    },
+    "lon": {
+      "type": "string"
+    },
+    "title": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

changedOutput schema / properties / display / properties / type / anyOf

Previous value: -[
-  {
-    "enum": [
-      "table",
-      "chart",
-      "metric",
-      "code",
-      "text",
-      "list"
-    ],
-    "type": "string"
-  },
-  {
-    "type": "string"
-  }
-]New value: +[
+  {
+    "enum": [
+      "table",
+      "chart",
+      "metric",
+      "code",
+      "text",
+      "list",
+      "map"
+    ],
+    "type": "string"
+  },
+  {
+    "type": "string"
+  }
+]

Changed1 schema field changedMay 1, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": true,
+  "properties": {
+    "data": {
+      "anyOf": [
+        {
+          "additionalProperties": true,
+          "properties": {
+            "affected_views": {
+              "items": {},
+              "type": "array"
+            },
+            "fk_dependencies": {
+              "items": {
+                "additionalProperties": true,
+                "properties": {
+                  "column": {
+                    "type": "string"
+                  },
+                  "references": {
+                    "type": "string"
+                  },
+                  "table": {
+                    "type": "string"
+                  }
+                },
+                "type": "object"
+              },
+              "type": "array"
+            },
+            "intent": {
+              "type": "string"
+            },
+            "recommendation": {
+              "type": "string"
+            },
+            "risk": {
+              "type": "string"
+            },
+            "row_count": {
+              "type": [
+                "number",
+                "string"
+              ]
+            },
+            "target_table": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "target_table"
+          ],
+          "type": "object"
+        },
+        {
+          "additionalProperties": true,
+          "properties": {
+            "code": {
+              "type": "string"
+            },
+            "details": {
+              "additionalProperties": {},
+              "type": "object"
+            },
+            "error": {
+              "type": "string"
+            },
+            "internal_code": {
+              "type": "string"
+            },
+            "message": {
+              "type": "string"
+            },
+            "retry_after_s": {
+              "type": "number"
+            }
+          },
+          "type": "object"
+        }
+      ]
+    },
+    "display": {
+      "additionalProperties": true,
+      "properties": {
+        "chart": {
+          "additionalProperties": true,
+          "properties": {
+            "chartType": {
+              "type": "string"
+            },
+            "color": {
+              "type": "string"
+            },
+            "title": {
+              "type": "string"
+            },
+            "x": {
+              "type": "string"
+            },
+            "xLabel": {
+              "type": "string"
+            },
+            "y": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "items": {
+                    "type": "string"
+                  },
+                  "type": "array"
+                }
+              ]
+            },
+            "yLabel": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "code": {
+          "additionalProperties": true,
+          "properties": {
+            "executable": {
+              "type": "boolean"
+            },
+            "language": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "sql",
+                    "json",
+                    "bash",
+                    "typescript"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            "title": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "metric": {
+          "additionalProperties": true,
+          "properties": {
+            "label": {
+              "type": "string"
+            },
+            "status": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "good",
+                    "warning",
+                    "critical"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            "trend": {
+              "anyOf": [
+                {
+                  "enum": [
+                    "up",
+                    "down",
+                    "neutral"
+                  ],
+                  "type": "string"
+                },
+                {
+                  "type": "string"
+                }
+              ]
+            },
+            "trendValue": {
+              "type": "string"
+            },
+            "unit": {
+              "type": "string"
+            },
+            "value": {
+              "type": [
+                "string",
+                "number"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        "type": {
+          "anyOf": [
+            {
+              "enum": [
+                "table",
+                "chart",
+                "metric",
+                "code",
+                "text",
+                "list"
+              ],
+              "type": "string"
+            },
+            {
+              "type": "string"
+            }
+          ]
+        }
+      },
+      "type": "object"
+    },
+    "insights": {
+      "items": {
+        "additionalProperties": true,
+        "properties": {
+          "column": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          },
+          "severity": {
+            "anyOf": [
+              {
+                "enum": [
+                  "info",
+                  "warning",
+                  "critical"
+                ],
+                "type": "string"
+              },
+              {
+                "type": "string"
+              }
+            ]
+          },
+          "value": {}
+        },
+        "required": [
+          "severity",
+          "message"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "meta": {
+      "additionalProperties": true,
+      "properties": {
+        "cacheHit": {
+          "type": "boolean"
+        },
+        "connection": {
+          "type": "string"
+        },
+        "dialect": {
+          "anyOf": [
+            {
+              "enum": [
+                "postgres",
+                "mysql",
+                "mssql"
+              ],
+              "type": "string"
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        "executionTimeMs": {
+          "$ref": "#/properties/data/anyOf/0/properties/row_count"
+        },
+        "plan": {},
+        "rowCount": {
+          "$ref": "#/properties/data/anyOf/0/properties/row_count"
+        },
+        "tool": {
+          "type": "string"
+        },
+        "truncated": {
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "summary": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

First observedApr 28, 2026

TDQS

A3.8/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and openWorldHint=true, so safety is covered. The description adds real value by disclosing the exact analytical outputs (FK dependencies, views, row counts, risk score), which tells the agent the operation is a multi-faceted static analysis rather than a simple lookup. Minor gap: no indication of latency or depth of the analysis.

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?

A single dense sentence with the object of analysis front-loaded before the enumerated output list, plus a short tier tag. No filler and nothing buried.

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?

With an output schema present and 100% parameter coverage, the description need not explain return shapes, and it correctly focuses on what the analysis covers. The only loose end is the unexplained '[ARCHITECT tier]' marker, which could confuse an agent about eligibility.

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 coverage is 100% and both parameters carry detailed descriptions, including a semantic-resolution protocol for 'connection' via list_connections. The description adds nothing beyond the schema, so 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?

Names a specific verb ('Analyze') and object ('blast radius of a proposed schema change') and enumerates the artifacts returned: FK dependencies, affected views, row count, risk score. This clearly distinguishes it from generate_migration, which produces DDL rather than analysis, though no sibling is named explicitly.

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 phrase 'proposed schema change' implies a pre-migration safety check, so the usage window is inferable. However, there is no explicit 'use this before X, not instead of Y' guidance, and the '[ARCHITECT tier]' tag is never explained as a gating or routing condition.

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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