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joakes90

vin-decode-mcp

by joakes90

Get Wmi Info

get_wmi_info

Decode a World Manufacturer Identifier (WMI) to find manufacturer details for vehicles. Enter a 3-character code for high-volume manufacturers or 6-character code for low-volume ones.

Instructions

Decode a World Manufacturer Identifier (WMI).

Returns manufacturer information for a 3- or 6-character WMI code (VIN positions 1-3, optionally + positions 12-14 for low-volume manufacturers).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
wmiYesWMI code (3 chars for high-volume, 6 for low-volume manufacturers).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. First observedv0.1.0

TDQS

A4.2/5.0
Behavior3/5

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

No annotations are provided, so the description carries the burden of explaining behavior. It communicates that this is a read-only lookup and defines the acceptable input scope, but it does not mention error handling, case sensitivity, or response format details. For a simple lookup tool, this is adequate but not rich.

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?

The description is two tight sentences with no filler. The core purpose is front-loaded, and the additional positional detail earns its place by improving input accuracy.

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 a one-parameter lookup with an output schema present, the description is essentially complete: it defines the input, its valid lengths, and the nature of the return value. Minor gaps like invalid-input behavior or character normalization are not critical for selecting and invoking the tool correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema already documents the wmi parameter well, so the baseline is 3. The description adds useful context about VIN positions and the low-volume manufacturer scenario, which helps an agent construct a valid WMI argument beyond what the schema states.

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?

The description states a specific verb ('Decode') and resource ('World Manufacturer Identifier'), and clarifies it handles 3- or 6-character WMI codes rather than full VINs. This clearly distinguishes it from siblings like decode_vin and decode_partial_vin.

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?

The description clearly signals the intended context: use this when you have a WMI code and need manufacturer information. It does not explicitly name sibling alternatives or state when not to use it, so it stops short of full when/when-not guidance.

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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