CompatAir

evaluate_air_compatibility

Read-onlyIdempotent

Evaluate documented air-supply compatibility for one compressor and one or more tools. Returns air-supply and complete-system verdicts separately; commercial data never changes either verdict.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`mode`	No
`toolIds`	Yes
`compressorId`	Yes

Output Schema

TableJSON Schema

Name	Required	Description	Default
`verdict`	Yes
`limitations`	Yes
`next_actions`	Yes
`canonical_url`	Yes
`verdict_scope`	Yes
`air_supply_verdict`	Yes
`overall_system_verdict`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed45 schema fields changedJul 20, 2026

addedInput schema / properties / compressorId
```
Added value: +{
+  "type": "string"
+}
```

removedInput schema / properties / configuration

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "compressor": {
-      "additionalProperties": false,
-      "properties": {
-        "id": {
-          "type": "string"
-        }
-      },
-      "required": [
-        "id"
-      ],
-      "type": "object"
-    },
-    "mode": {
-      "enum": [
-        "simultaneous",
-        "successive"
-      ],
-      "type": "string"
-    },
-    "tools": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "id"
-        ],
-        "type": "object"
-      },
-      "maxItems": 20,
-      "minItems": 1,
-      "type": "array"
-    }
-  },
-  "required": [
-    "tools"
-  ],
-  "type": "object"
-}

removedInput schema / properties / constraints

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "country": {
-      "const": "FR",
-      "type": "string"
-    },
-    "currency": {
-      "const": "EUR",
-      "type": "string"
-    },
-    "max_total_minor": {
-      "maximum": 100000000,
-      "minimum": 0,
-      "type": "integer"
-    },
-    "minimum_merchants": {
-      "maximum": 10,
-      "minimum": 1,
-      "type": "integer"
-    }
-  },
-  "type": "object"
-}

removedInput schema / properties / intent

Removed value: -{
-  "enum": [
-    "will_it_work",
-    "explain_limits",
-    "find_minimal_change",
-    "build_complete_system"
-  ],
-  "type": "string"
-}

removedInput schema / properties / meta

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "ucp-agent": {
-      "additionalProperties": false,
-      "properties": {
-        "profile": {
-          "format": "uri",
-          "maxLength": 4096,
-          "type": "string"
-        }
-      },
-      "required": [
-        "profile"
-      ],
-      "type": "object"
-    }
-  },
-  "required": [
-    "ucp-agent"
-  ],
-  "type": "object"
-}

addedInput schema / properties / mode

Added value: +{
+  "enum": [
+    "simultaneous",
+    "successive"
+  ],
+  "type": "string"
+}

removedInput schema / properties / requested_outputs

Removed value: -{
-  "items": {
-    "enum": [
-      "compatibility",
-      "mandatory_accessories",
-      "limits",
-      "alternatives",
-      "complete_configuration",
-      "attribution",
-      "evidence"
-    ],
-    "type": "string"
-  },
-  "maxItems": 7,
-  "type": "array",
-  "uniqueItems": true
-}

addedInput schema / properties / toolIds

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "maxItems": 20,
+  "minItems": 1,
+  "type": "array"
+}

removedInput schema / properties / ucp

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "version": {
-      "const": "2026-04-08",
-      "type": "string"
-    }
-  },
-  "required": [
-    "version"
-  ],
-  "type": "object"
-}

changedInput schema / required

Previous value: -[
-  "meta",
-  "ucp",
-  "configuration"
-]New value: +[
+  "compressorId",
+  "toolIds"
+]

changedOutput schema / additionalProperties
```
Previous value: -falseNew value: +true
```
changedOutput schema / properties / air_supply_verdict / additionalProperties
```
Previous value: -falseNew value: +true
```
removedOutput schema / properties / air_supply_verdict / properties / limiting_factor
```
Removed value: -{
-  "type": [
-    "string",
-    "null"
-  ]
-}
```

removedOutput schema / properties / air_supply_verdict / properties / metrics

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "available_fad_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "available_pressure_bar": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "demand_flow_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "effective_average_capacity_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "margin_percent": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "mode": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "recommended_fad_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "required_fad_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "required_pressure_bar": {
-      "type": [
-        "number",
-        "null"
-      ]
-    }
-  },
-  "required": [],
-  "type": "object"
-}

removedOutput schema / properties / airgraph

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "configuration_id": {
-      "type": "string"
-    },
-    "edges": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "from": {
-            "type": "string"
-          },
-          "relation": {
-            "type": "string"
-          },
-          "to": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "from",
-          "to",
-          "relation"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "nodes": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "canonical_url": {
-            "format": "uri",
-            "type": "string"
-          },
-          "id": {
-            "type": "string"
-          },
-          "label": {
-            "type": "string"
-          },
-          "type": {
-            "type": "string"
-          },
-          "unit": {
-            "type": "string"
-          },
-          "value": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "type": "number"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              }
-            ]
-          }
-        },
-        "required": [
-          "id",
-          "type"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "schema_version": {
-      "type": "string"
-    }
-  },
-  "required": [
-    "schema_version",
-    "configuration_id",
-    "nodes",
-    "edges"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / alternatives

Removed value: -{
-  "items": {
-    "additionalProperties": false,
-    "properties": {
-      "air_supply_verdict": {
-        "additionalProperties": false,
-        "properties": {
-          "engine_verdict": {
-            "enum": [
-              "continuous",
-              "intermittent",
-              "incompatible",
-              "insufficient_data"
-            ],
-            "type": "string"
-          },
-          "limitations": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "limiting_factor": {
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "metrics": {
-            "additionalProperties": false,
-            "properties": {
-              "available_fad_lpm": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "available_pressure_bar": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "demand_flow_lpm": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "effective_average_capacity_lpm": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "margin_percent": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "mode": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "recommended_fad_lpm": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "required_fad_lpm": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              },
-              "required_pressure_bar": {
-                "type": [
-                  "number",
-                  "null"
-                ]
-              }
-            },
-            "required": [],
-            "type": "object"
-          },
-          "schema_version": {
-            "const": "2.0.0"
-          },
-          "scope": {
-            "enum": [
-              "information",
-              "request",
-              "air_supply",
-              "complete_air_system",
-              "commercial_constraints"
-            ],
-            "type": "string"
-          },
-          "verdict": {
-            "enum": [
-              "information",
-              "compatible",
-              "compatible_with_limits",
-              "incompatible",
-              "insufficient_data"
-            ],
-            "type": "string"
-          }
-        },
-        "required": [
-          "schema_version",
-          "scope",
-          "verdict",
-          "limitations"
-        ],
-        "type": "object"
-      },
-      "change": {
-        "additionalProperties": false,
-        "properties": {
-          "field": {
-            "const": "compressorId"
-          },
-          "from": {
-            "type": "string"
-          },
-          "to": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "field",
-          "from",
-          "to"
-        ],
-        "type": "object"
-      },
-      "compressor": {
-        "additionalProperties": false,
-        "properties": {
-          "brand": {
-            "type": "string"
-          },
-          "canonical_url": {
-            "format": "uri",
-            "type": "string"
-          },
-          "compat_air_id": {
-            "type": "string"
-          },
-          "ean": {
-            "type": "string"
-          },
-          "id": {
-            "type": "string"
-          },
-          "label": {
-            "type": "string"
-          },
-          "match_confidence": {
-            "enum": [
-              "exact",
-              "candidate"
-            ],
-            "type": "string"
-          },
-          "model": {
-            "type": "string"
-          },
-          "mpn": {
-            "type": "string"
-          },
-          "slug": {
-            "type": "string"
-          },
-          "type": {
-            "enum": [
-              "compressor",
-              "tool"
-            ],
-            "type": "string"
-          }
-        },
-        "required": [
-          "compat_air_id",
-          "type",
-          "id",
-          "slug",
-          "brand",
-          "model",
-          "canonical_url"
-        ],
-        "type": "object"
-      },
-      "evaluation": {
-        "additionalProperties": false,
-        "properties": {
-          "availableFadBasis": {
-            "enum": [
-              "exact",
-              "interpolated",
-              "higher-pressure-bound"
-            ],
-            "type": "string"
-          },
-          "availableFadLpm": {
-            "type": "number"
-          },
-          "availableFadReferencePressureBar": {
-            "type": "number"
-          },
-          "calculationVersion": {
-            "type": "string"
-          },
-          "demandFlowLpm": {
-            "type": "number"
-          },
-          "effectiveAverageCapacityLpm": {
-            "type": "number"
-          },
-          "limitations": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "limitingFactor": {
-            "type": "string"
-          },
-          "marginPercent": {
-            "type": "number"
-          },
-          "mode": {
-            "enum": [
-              "simultaneous",
-              "successive"
-            ],
-            "type": "string"
-          },
-          "recommendedFadLpm": {
-            "type": "number"
-          },
-          "requiredFadLpm": {
-            "type": "number"
-          },
-          "requiredPressureBar": {
-            "type": "number"
-          },
-          "verdict": {
-            "enum": [
-              "continuous",
-              "intermittent",
-              "incompatible",
-              "insufficient_data"
-            ],
-            "type": "string"
-          },
-          "warnings": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          }
-        },
-        "required": [
-          "verdict"
-        ],
-        "type": "object"
-      }
-    },
-    "required": [
-      "change",
-      "compressor",
-      "evaluation"
-    ],
-    "type": "object"
-  },
-  "type": "array"
-}

removedOutput schema / properties / attribution

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "canonical_url": {
-      "format": "uri",
-      "type": "string"
-    },
-    "method_version": {
-      "type": "string"
-    },
-    "provider": {
-      "const": "CompatAir"
-    }
-  },
-  "required": [
-    "provider",
-    "canonical_url",
-    "method_version"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / canonical_follow_url

Removed value: -{
-  "format": "uri",
-  "type": "string"
-}

removedOutput schema / properties / capability
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / capability_version
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / catalogVersion
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / catalog_version
```
Removed value: -{
-  "type": "string"
-}
```

removedOutput schema / properties / commercial_constraints

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "covered_products": {
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "currency": {
-      "const": "EUR"
-    },
-    "merchant_count": {
-      "type": "integer"
-    },
-    "minimum_total_minor": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "offer_snapshot_version": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "requested": {
-      "additionalProperties": false,
-      "properties": {
-        "country": {
-          "const": "FR"
-        },
-        "currency": {
-          "const": "EUR"
-        },
-        "max_total_minor": {
-          "type": "number"
-        },
-        "minimum_merchants": {
-          "type": "number"
-        }
-      },
-      "required": [],
-      "type": "object"
-    },
-    "verdict": {
-      "additionalProperties": false,
-      "properties": {
-        "engine_verdict": {
-          "enum": [
-            "continuous",
-            "intermittent",
-            "incompatible",
-            "insufficient_data"
-          ],
-          "type": "string"
-        },
-        "limitations": {
-          "items": {
-            "type": "string"
-          },
-          "type": "array"
-        },
-        "limiting_factor": {
-          "type": [
-            "string",
-            "null"
-          ]
-        },
-        "metrics": {
-          "additionalProperties": false,
-          "properties": {
-            "available_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "available_pressure_bar": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "demand_flow_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "effective_average_capacity_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "margin_percent": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "mode": {
-              "type": [
-                "string",
-                "null"
-              ]
-            },
-            "recommended_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "required_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "required_pressure_bar": {
-              "type": [
-                "number",
-                "null"
-              ]
-            }
-          },
-          "required": [],
-          "type": "object"
-        },
-        "schema_version": {
-          "const": "2.0.0"
-        },
-        "scope": {
-          "enum": [
-            "information",
-            "request",
-            "air_supply",
-            "complete_air_system",
-            "commercial_constraints"
-          ],
-          "type": "string"
-        },
-        "verdict": {
-          "enum": [
-            "information",
-            "compatible",
-            "compatible_with_limits",
-            "incompatible",
-            "insufficient_data"
-          ],
-          "type": "string"
-        }
-      },
-      "required": [
-        "schema_version",
-        "scope",
-        "verdict",
-        "limitations"
-      ],
-      "type": "object"
-    },
-    "verified": {
-      "type": "boolean"
-    }
-  },
-  "required": [
-    "requested",
-    "verified",
-    "verdict",
-    "offer_snapshot_version",
-    "covered_products",
-    "merchant_count",
-    "minimum_total_minor",
-    "currency"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / compatibility

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "engine_verdict": {
-      "enum": [
-        "continuous",
-        "intermittent",
-        "incompatible",
-        "insufficient_data"
-      ],
-      "type": "string"
-    },
-    "limitations": {
-      "items": {
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "limiting_factor": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "metrics": {
-      "additionalProperties": false,
-      "properties": {
-        "available_fad_lpm": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "available_pressure_bar": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "demand_flow_lpm": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "effective_average_capacity_lpm": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "margin_percent": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "mode": {
-          "type": [
-            "string",
-            "null"
-          ]
-        },
-        "recommended_fad_lpm": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "required_fad_lpm": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "required_pressure_bar": {
-          "type": [
-            "number",
-            "null"
-          ]
-        }
-      },
-      "required": [],
-      "type": "object"
-    },
-    "schema_version": {
-      "const": "2.0.0"
-    },
-    "scope": {
-      "enum": [
-        "information",
-        "request",
-        "air_supply",
-        "complete_air_system",
-        "commercial_constraints"
-      ],
-      "type": "string"
-    },
-    "verdict": {
-      "enum": [
-        "information",
-        "compatible",
-        "compatible_with_limits",
-        "incompatible",
-        "insufficient_data"
-      ],
-      "type": "string"
-    }
-  },
-  "required": [
-    "schema_version",
-    "scope",
-    "verdict",
-    "limitations"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / compatibility_receipt

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "air_supply_verdict": {
-      "additionalProperties": false,
-      "properties": {
-        "engine_verdict": {
-          "enum": [
-            "continuous",
-            "intermittent",
-            "incompatible",
-            "insufficient_data"
-          ],
-          "type": "string"
-        },
-        "limitations": {
-          "items": {
-            "type": "string"
-          },
-          "type": "array"
-        },
-        "limiting_factor": {
-          "type": [
-            "string",
-            "null"
-          ]
-        },
-        "metrics": {
-          "additionalProperties": false,
-          "properties": {
-            "available_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "available_pressure_bar": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "demand_flow_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "effective_average_capacity_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "margin_percent": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "mode": {
-              "type": [
-                "string",
-                "null"
-              ]
-            },
-            "recommended_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "required_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "required_pressure_bar": {
-              "type": [
-                "number",
-                "null"
-              ]
-            }
-          },
-          "required": [],
-          "type": "object"
-        },
-        "schema_version": {
-          "const": "2.0.0"
-        },
-        "scope": {
-          "enum": [
-            "information",
-            "request",
-            "air_supply",
-            "complete_air_system",
-            "commercial_constraints"
-          ],
-          "type": "string"
-        },
-        "verdict": {
-          "enum": [
-            "information",
-            "compatible",
-            "compatible_with_limits",
-            "incompatible",
-            "insufficient_data"
-          ],
-          "type": "string"
-        }
-      },
-      "required": [
-        "schema_version",
-        "scope",
-        "verdict",
-        "limitations"
-      ],
-      "type": "object"
-    },
-    "canonical_url": {
-      "format": "uri",
-      "type": "string"
-    },
-    "catalog_version": {
-      "type": "string"
-    },
-    "configuration_id": {
-      "type": "string"
-    },
-    "integrity": {
-      "additionalProperties": false,
-      "properties": {
-        "algorithm": {
-          "const": "sha-256"
-        },
-        "canonicalization": {
-          "const": "json-sort-keys-v1"
-        },
-        "digest": {
-          "pattern": "^[a-f0-9]{64}$",
-          "type": "string"
-        }
-      },
-      "required": [
-        "algorithm",
-        "digest",
-        "canonicalization"
-      ],
-      "type": "object"
-    },
-    "method_version": {
-      "type": "string"
-    },
-    "observed_at": {
-      "format": "date",
-      "type": "string"
-    },
-    "overall_system_verdict": {
-      "additionalProperties": false,
-      "properties": {
-        "engine_verdict": {
-          "enum": [
-            "continuous",
-            "intermittent",
-            "incompatible",
-            "insufficient_data"
-          ],
-          "type": "string"
-        },
-        "limitations": {
-          "items": {
-            "type": "string"
-          },
-          "type": "array"
-        },
-        "limiting_factor": {
-          "type": [
-            "string",
-            "null"
-          ]
-        },
-        "metrics": {
-          "additionalProperties": false,
-          "properties": {
-            "available_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "available_pressure_bar": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "demand_flow_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "effective_average_capacity_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "margin_percent": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "mode": {
-              "type": [
-                "string",
-                "null"
-              ]
-            },
-            "recommended_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "required_fad_lpm": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "required_pressure_bar": {
-              "type": [
-                "number",
-                "null"
-              ]
-            }
-          },
-          "required": [],
-          "type": "object"
-        },
-        "schema_version": {
-          "const": "2.0.0"
-        },
-        "scope": {
-          "enum": [
-            "information",
-            "request",
-            "air_supply",
-            "complete_air_system",
-            "commercial_constraints"
-          ],
-          "type": "string"
-        },
-        "verdict": {
-          "enum": [
-            "information",
-            "compatible",
-            "compatible_with_limits",
-            "incompatible",
-            "insufficient_data"
-          ],
-          "type": "string"
-        }
-      },
-      "required": [
-        "schema_version",
-        "scope",
-        "verdict",
-        "limitations"
-      ],
-      "type": "object"
-    },
-    "receipt_id": {
-      "pattern": "^ca:receipt:[a-f0-9]{64}$",
-      "type": "string"
-    },
-    "schema_version": {
-      "const": "1.0.0"
-    },
-    "source_urls": {
-      "items": {
-        "format": "uri",
-        "type": "string"
-      },
-      "type": "array",
-      "uniqueItems": true
-    },
-    "verification_url": {
-      "format": "uri",
-      "type": "string"
-    }
-  },
-  "required": [
-    "schema_version",
-    "receipt_id",
-    "configuration_id",
-    "overall_system_verdict",
-    "air_supply_verdict",
-    "method_version",
-    "catalog_version",
-    "observed_at",
-    "canonical_url",
-    "source_urls",
-    "integrity",
-    "verification_url"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / complete_configuration

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "compressor": {
-      "oneOf": [
-        {
-          "additionalProperties": false,
-          "properties": {
-            "brand": {
-              "type": "string"
-            },
-            "canonical_url": {
-              "format": "uri",
-              "type": "string"
-            },
-            "compat_air_id": {
-              "type": "string"
-            },
-            "ean": {
-              "type": "string"
-            },
-            "id": {
-              "type": "string"
-            },
-            "label": {
-              "type": "string"
-            },
-            "match_confidence": {
-              "enum": [
-                "exact",
-                "candidate"
-              ],
-              "type": "string"
-            },
-            "model": {
-              "type": "string"
-            },
-            "mpn": {
-              "type": "string"
-            },
-            "slug": {
-              "type": "string"
-            },
-            "type": {
-              "enum": [
-                "compressor",
-                "tool"
-              ],
-              "type": "string"
-            }
-          },
-          "required": [
-            "compat_air_id",
-            "type",
-            "id",
-            "slug",
-            "brand",
-            "model",
-            "canonical_url"
-          ],
-          "type": "object"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "connectors": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "filtration": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "hoses": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "lubrication": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "tools": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "brand": {
-            "type": "string"
-          },
-          "canonical_url": {
-            "format": "uri",
-            "type": "string"
-          },
-          "compat_air_id": {
-            "type": "string"
-          },
-          "ean": {
-            "type": "string"
-          },
-          "id": {
-            "type": "string"
-          },
-          "label": {
-            "type": "string"
-          },
-          "match_confidence": {
-            "enum": [
-              "exact",
-              "candidate"
-            ],
-            "type": "string"
-          },
-          "model": {
-            "type": "string"
-          },
-          "mpn": {
-            "type": "string"
-          },
-          "slug": {
-            "type": "string"
-          },
-          "type": {
-            "enum": [
-              "compressor",
-              "tool"
-            ],
-            "type": "string"
-          }
-        },
-        "required": [
-          "compat_air_id",
-          "type",
-          "id",
-          "slug",
-          "brand",
-          "model",
-          "canonical_url"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    }
-  },
-  "required": [
-    "compressor",
-    "tools",
-    "hoses",
-    "connectors",
-    "filtration",
-    "lubrication"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / configuration_id
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / engineVersion
```
Removed value: -{
-  "type": "string"
-}
```

removedOutput schema / properties / error

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "code": {
-      "enum": [
-        "invalid_arguments",
-        "insufficient_data"
-      ],
-      "type": "string"
-    },
-    "message": {
-      "type": "string"
-    },
-    "retryable": {
-      "type": "boolean"
-    },
-    "scope": {
-      "const": "request"
-    }
-  },
-  "required": [
-    "code",
-    "message",
-    "scope",
-    "retryable"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / evidence_urls

Removed value: -{
-  "items": {
-    "format": "uri",
-    "type": "string"
-  },
-  "type": "array",
-  "uniqueItems": true
-}

removedOutput schema / properties / intent

Removed value: -{
-  "type": "string"
-}

removedOutput schema / properties / limits

Removed value: -{
-  "items": {
-    "type": "string"
-  },
-  "type": "array"
-}

removedOutput schema / properties / mandatory_accessories

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "connectors": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "filtration": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "hoses": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    },
-    "lubrication": {
-      "items": {
-        "additionalProperties": false,
-        "properties": {
-          "requirement": {
-            "oneOf": [
-              {
-                "type": "string"
-              },
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "innerDiameterMm": {
-                    "type": "number"
-                  },
-                  "maximumLengthMeters": {
-                    "type": "number"
-                  }
-                },
-                "required": [],
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "tool_id": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "tool_id",
-          "requirement"
-        ],
-        "type": "object"
-      },
-      "type": "array"
-    }
-  },
-  "required": [
-    "hoses",
-    "connectors",
-    "filtration",
-    "lubrication"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / method_version
```
Removed value: -{
-  "type": "string"
-}
```

removedOutput schema / properties / observed_at

Removed value: -{
-  "format": "date",
-  "type": "string"
-}

changedOutput schema / properties / overall_system_verdict / additionalProperties
```
Previous value: -falseNew value: +true
```
removedOutput schema / properties / overall_system_verdict / properties / limiting_factor
```
Removed value: -{
-  "type": [
-    "string",
-    "null"
-  ]
-}
```

removedOutput schema / properties / overall_system_verdict / properties / metrics

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "available_fad_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "available_pressure_bar": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "demand_flow_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "effective_average_capacity_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "margin_percent": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "mode": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "recommended_fad_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "required_fad_lpm": {
-      "type": [
-        "number",
-        "null"
-      ]
-    },
-    "required_pressure_bar": {
-      "type": [
-        "number",
-        "null"
-      ]
-    }
-  },
-  "required": [],
-  "type": "object"
-}

removedOutput schema / properties / product_urls

Removed value: -{
-  "items": {
-    "format": "uri",
-    "type": "string"
-  },
-  "type": "array",
-  "uniqueItems": true
-}

removedOutput schema / properties / proof_urls

Removed value: -{
-  "items": {
-    "format": "uri",
-    "type": "string"
-  },
-  "type": "array",
-  "uniqueItems": true
-}

removedOutput schema / properties / security

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "accepts_payment": {
-      "const": false
-    },
-    "accepts_pii": {
-      "const": false
-    },
-    "access": {
-      "const": "anonymous_read_only"
-    },
-    "mutates_commerce_state": {
-      "const": false
-    }
-  },
-  "required": [
-    "access",
-    "accepts_pii",
-    "accepts_payment",
-    "mutates_commerce_state"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / source_urls

Removed value: -{
-  "items": {
-    "format": "uri",
-    "type": "string"
-  },
-  "type": "array",
-  "uniqueItems": true
-}

removedOutput schema / properties / ucp

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "capabilities": {
-      "additionalProperties": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "version": {
-              "type": "string"
-            }
-          },
-          "required": [
-            "version"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "type": "object"
-    },
-    "version": {
-      "type": "string"
-    }
-  },
-  "required": [
-    "version",
-    "capabilities"
-  ],
-  "type": "object"
-}

removedOutput schema / properties / verdict_schema_version
```
Removed value: -{
-  "const": "2.0.0"
-}
```

changedOutput schema / required

Previous value: -[
-  "verdict",
-  "verdict_scope",
-  "verdict_schema_version",
-  "canonical_url",
-  "product_urls",
-  "source_urls",
-  "method_version",
-  "catalog_version",
-  "observed_at",
-  "limitations",
-  "next_actions",
-  "catalogVersion",
-  "engineVersion"
-]New value: +[
+  "verdict",
+  "verdict_scope",
+  "canonical_url",
+  "limitations",
+  "next_actions",
+  "overall_system_verdict",
+  "air_supply_verdict"
+]

Changed2 schema fields changedJul 18, 2026
- addedOutput schema / properties / alternatives / items / properties / evaluation / properties / availableFadBasis
```
Added value: +{
+  "enum": [
+    "exact",
+    "interpolated",
+    "higher-pressure-bound"
+  ],
+  "type": "string"
+}
```
- addedOutput schema / properties / alternatives / items / properties / evaluation / properties / availableFadReferencePressureBar
```
Added value: +{
+  "type": "number"
+}
```
Changed1 schema field changedJul 16, 2026
- addedOutput schema / properties / canonical_follow_url
```
Added value: +{
+  "format": "uri",
+  "type": "string"
+}
```
First observedJul 16, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Annotations already provide readOnlyHint, idempotentHint, etc. Description adds value by noting that commercial data never changes verdict and that verdicts are returned separately, which goes beyond annotations.

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?

Two sentences, no unnecessary words. Front-loaded with verb and resource, efficient.

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?

Covers key behavior and output structure. Missing explanation of mode parameter, but output schema likely details return values. Overall adequate for a read-only tool.

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 coverage is 0%, and description does not explain any parameters. compressorId, toolIds, and mode (with enum) are not described, leaving the agent to infer their meaning from names alone.

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?

Description clearly states it evaluates documented air-supply compatibility for a compressor and tools. Distinguishes from siblings by specifying separate verdicts for air-supply and complete-system, and that commercial data doesn't change verdict.

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?

Description implies usage for evaluating compatibility, with no explicit when-not-to-use or alternatives, but context makes it clear. Lacks explicit contrast with siblings like find_compatible_alternatives.

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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