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

TableJSON 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

TableJSON 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

Schema Changelog

Changes observed during successful MCP inspections.

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

A4/5.0

Behavior4/5

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

Annotations already cover the safety profile (readOnly, non-destructive, not open-world), so the bar is lower. The description still adds real context beyond them: results are 'normalized supported facts,' implying partial coverage, and are returned 'only after identity resolves safely,' signaling an identity-resolution gate before data is emitted.

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, both earning their place: the first front-loads the use case and identity paths, the second characterizes the output. No filler or repetition.

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?

For an 8-parameter tool with no required fields, an output schema, and a non-trivial identity model (VIN vs. attributes vs. configuration_id), the description covers the two identity paths and the resolution gate adequately. The NEEDS_IDENTITY-to-configuration_id retry flow is left to the schema.

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 every parameter including the optional trim/engine/drivetrain refinements and configuration_id is already documented. The description restates the VIN vs year/make/model identity split but adds no syntax or refinement details beyond the schema, so the baseline 3 applies.

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

Purpose4/5

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

States a specific verb and resource (vehicle specifications) and enumerates the returned domains: engine, displacement, cylinders, horsepower, transmission, drivetrain, fuel type. The 'engine and powertrain' scoping implicitly separates it from siblings like get_vehicle_safety or get_vehicle_efficiency, but 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 Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Use this when engine and powertrain specifications are needed' gives a clear triggering condition, and it names the two accepted identity paths (VIN, or year/make/model). There is no exclusion guidance or explicit reference to resolve_vehicle 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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