AUTO411 Vehicle Intelligence

Get Vehicle Specifications

get_vehicle_specs

Read-only

Use this when engine and powertrain specifications are needed for a vehicle identified by VIN or year, make, and model. Returns normalized supported facts such as engine, displacement, cylinders, horsepower, transmission, drivetrain, and fuel type only after identity resolves safely.

Input Schema

Name	Required	Description
`vin`	No	Full 17-character VIN. Use VIN by itself as the identity path, or omit it and provide year, make, and model.
`make`	No	Vehicle make. Required with year and model when VIN is not provided.
`trim`	No	Optional identity refinement. Use only an explicitly known trim.
`year`	No	Model year. Required with make and model when VIN is not provided.
`model`	No	Customer-facing model family. Required with year and make when VIN is not provided.
`engine`	No	Optional identity refinement. Use only an explicitly known engine.
`drivetrain`	No	Optional identity refinement. Use only an explicitly known drivetrain.
`configuration_id`	No	AUTO411 configuration identifier returned by a prior NEEDS_IDENTITY response.

Output Schema

Name	Required	Description	Default
`error`	No
`choices`	No
`conflicts`	No
`fact_scope`	No
`choice_count`	No
`completeness`	No
`missing_fields`	No
`specifications`	No
`evidence_status`	No
`policy_withheld`	No
`configuration_id`	No
`agent_instruction`	Yes
`canonical_vehicle`	No
`resolution_status`	Yes
`specification_availability`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedNov 5, 2026

addedOutput schema / properties / specification_availability

Added value: +{
+  "additionalProperties": {
+    "additionalProperties": false,
+    "properties": {
+      "label": {
+        "type": "string"
+      },
+      "status": {
+        "enum": [
+          "AVAILABLE",
+          "NOT_YET_VERIFIED",
+          "NEEDS_IDENTITY",
+          "CONFLICT"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "status",
+      "label"
+    ],
+    "type": "object"
+  },
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}

Changed9 schema fields changedSep 28, 2026

addedInput schema / properties / configuration_id / description

Added value: +"AUTO411 configuration identifier returned by a prior NEEDS_IDENTITY response."

addedInput schema / properties / drivetrain / description

Added value: +"Optional identity refinement. Use only an explicitly known drivetrain."

addedInput schema / properties / engine / description

Added value: +"Optional identity refinement. Use only an explicitly known engine."

addedInput schema / properties / make / description

Added value: +"Vehicle make. Required with year and model when VIN is not provided."

addedInput schema / properties / model / description

Added value: +"Customer-facing model family. Required with year and make when VIN is not provided."

addedInput schema / properties / trim / description

Added value: +"Optional identity refinement. Use only an explicitly known trim."

changedInput schema / properties / vin / description

Previous value: -"17-character VIN"New value: +"Full 17-character VIN. Use VIN by itself as the identity path, or omit it and provide year, make, and model."

addedInput schema / properties / year / description

Added value: +"Model year. Required with make and model when VIN is not provided."

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": {},
+  "properties": {
+    "agent_instruction": {
+      "type": "string"
+    },
+    "canonical_vehicle": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {
+            "configuration_id": {
+              "type": "number"
+            },
+            "drivetrain": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "engine": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "generation": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "identity": {
+              "additionalProperties": {
+                "type": [
+                  "string",
+                  "number",
+                  "boolean",
+                  "null"
+                ]
+              },
+              "propertyNames": {
+                "type": "string"
+              },
+              "type": "object"
+            },
+            "make": {
+              "type": "string"
+            },
+            "model": {
+              "type": "string"
+            },
+            "trim": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "year": {
+              "type": [
+                "number",
+                "string"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "choice_count": {
+      "maximum": 9007199254740991,
+      "minimum": 0,
+      "type": "integer"
+    },
+    "choices": {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "configuration_id": {
+            "type": "number"
+          },
+          "drivetrain": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "engine": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "evidence_status": {
+            "type": "string"
+          },
+          "generation": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "identity": {
+            "additionalProperties": {
+              "type": [
+                "string",
+                "number",
+                "boolean",
+                "null"
+              ]
+            },
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          },
+          "trim": {
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "required": [
+          "configuration_id"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "completeness": {
+      "type": "string"
+    },
+    "configuration_id": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "conflicts": {
+      "items": {},
+      "type": "array"
+    },
+    "error": {
+      "additionalProperties": {},
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "retryable": {
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "code"
+      ],
+      "type": "object"
+    },
+    "evidence_status": {
+      "type": "string"
+    },
+    "fact_scope": {
+      "type": "string"
+    },
+    "missing_fields": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "policy_withheld": {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "category": {
+            "type": "string"
+          },
+          "policy_state": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "category",
+          "policy_state"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "resolution_status": {
+      "enum": [
+        "INVALID_INPUT",
+        "MATCHED_SINGLE",
+        "NEEDS_IDENTITY",
+        "NO_MATCH",
+        "UNAVAILABLE",
+        "SOURCE_UNAVAILABLE"
+      ],
+      "type": "string"
+    },
+    "specifications": {
+      "additionalProperties": {
+        "additionalProperties": {},
+        "properties": {
+          "evidence": {
+            "additionalProperties": {},
+            "properties": {
+              "evidence_status": {
+                "type": "string"
+              },
+              "fact_scope": {
+                "type": "string"
+              }
+            },
+            "type": "object"
+          },
+          "facts": {
+            "additionalProperties": {},
+            "propertyNames": {
+              "type": "string"
+            },
+            "type": "object"
+          },
+          "status": {
+            "type": "string"
+          },
+          "values": {
+            "items": {},
+            "type": "array"
+          }
+        },
+        "type": "object"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    }
+  },
+  "required": [
+    "resolution_status",
+    "agent_instruction"
+  ],
+  "type": "object"
+}

First observedSep 27, 2026

TDQS

A3.8/5.0

Behavior3/5

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

Annotations already declare readOnly=true, destructive=false, and closed-world, so the safety profile is covered. The description does add a genuinely useful behavioral fact: results come back normalized and only 'after identity resolves safely,' which warns the agent an identity-resolution step may precede data. It doesn't characterize what happens on failure or how the NEEDS_IDENTITY path behaves.

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 tight sentences, front-loaded with the usage trigger, then the return contract. No redundant restatement of the tool name and no filler.

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, the return fields needn't be explained in prose, and annotations cover the safety profile, so the definition is nearly complete. The one gap is the identity-resolution/NEEDS_IDENTITY pathway: configuration_id references a prior response the description only alludes to vaguely.

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%, so the schema already documents every parameter including the VIN-vs-year/make/model alternative and the refinement fields. The description restates the dual identity paths without adding format, precedence, or conflict-resolution detail beyond what the schema says.

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?

The description states a specific verb and resource: retrieving engine and powertrain specifications for a vehicle. The topical scoping ('engine and powertrain') implicitly separates it from siblings like get_vehicle_efficiency and get_vehicle_safety, but no sibling is ever named, and its relationship to resolve_vehicle is only hinted at via the identity-resolution clause.

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?

It gives a clear triggering condition ('Use this when engine and powertrain specifications are needed') and enumerates the two accepted identity paths (VIN alone, or year/make/model). It stops short of explicit exclusions or naming which sibling to use instead when identity is unknown.

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

All AUTO411 Vehicle Intelligence tools Inspect

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