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vessel-api

VesselAPI MCP Server

get_vessel_classification

Retrieve classification details for a vessel including class society, surveys, and hull information using IMO, MMSI, or vessel ID.

Instructions

Get the classification details for a vessel (class society, surveys, hull info)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
vesselIdYesVessel identifier (IMO number by default)
idTypeNoIdentifier type: imo (default), mmsi, or vesselId
Behavior2/5

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

With no annotations, the description carries the burden of behavioral disclosure. It only states 'Get' but does not confirm read-only behavior, potential errors, data sources, or any side effects. Minimal transparency.

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?

Single, clear sentence with no superfluous words. Efficiently communicates the core purpose.

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

Completeness3/5

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

Adequate for a simple lookup tool, but given the lack of output schema, the description could better hint at the return structure. It lists some detail categories but is not fully comprehensive.

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 description adds no extra semantic value beyond the schema. Baseline 3 is appropriate as the description is redundant.

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 clearly states the verb 'Get' and the resource 'classification details' with specific items (class society, surveys, hull info). It effectively distinguishes from sibling tools like get_vessel_inspections or get_vessel.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives. There is no mention of prerequisites, such as requiring a valid vessel ID, or scenarios where this tool is preferred over other vessel-specific tools.

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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