osint_vin_decoder

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

No annotations are provided, so the description must convey behavioral traits. It mentions check-digit validity (implying validation) but does not disclose what happens on invalid input, rate limits, authorization needs, or the fact that it only works on 17-character VINs (implied but not explicit). Side effects are not noted.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is short and front-loaded with purpose, but the 'Menu ID: vin_decoder. VIN Decoder.' prefix is redundant. The core functional description is concise, earning a high score for efficiency.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

While the description lists some outputs, it lacks critical context: no output schema, no parameter documentation, and no explanation of return format or error handling. The mention of using describe_tool for full guidance partially compensates but the tool definition itself is incomplete.

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

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

The input schema has no defined parameters (additionalProperties: true), and the description does not specify how to input the VIN. The agent is left without guidance on what parameter name or format to use. Schema description coverage is misleadingly 100% due to zero defined parameters, but the description adds no clarification.

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

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

The description clearly states the tool decodes VINs to extract specific data fields (manufacturer, model year, etc.) and distinguishes itself from sibling osint tools that handle different data types. The verb 'Decode' and specific resource 'Vehicle Identification Numbers' provide clear purpose.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

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

The description mentions using describe_tool for full guidance, but does not explicitly state when to use this tool vs alternatives or provide exclusion criteria. No direct guidance on prerequisites or scenarios.

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