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SoapyRED

FreightUtils MCP Server

by SoapyRED

chargeable_weight_calculator

Calculate air freight chargeable weight by comparing volumetric and actual weight. Determine shipping costs using IATA standard or custom volumetric factors for accurate freight quotes.

Instructions

Calculate air freight chargeable weight (volumetric vs actual).

Airlines charge by "chargeable weight" — the greater of actual weight or volumetric weight. The IATA standard volumetric factor is 6,000 (1 CBM = 166.67 kg). Some carriers use different factors (e.g., 5,000 for DHL).

Use this tool when you need to:

  • Quote air freight shipments

  • Determine if a shipment is charged by volume or weight

  • Compare volumetric factors across carriers

A ratio > 1.0 means the shipment is "volumetric" (light for its size). A ratio < 1.0 means it's "heavy" (dense cargo).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
length_cmYesLength in centimetres
width_cmYesWidth in centimetres
height_cmYesHeight in centimetres
gross_weight_kgYesActual gross weight in kilograms
piecesNoNumber of identical pieces (default: 1)
factorNoVolumetric divisor (default: 6000 IATA standard, DHL uses 5000)
Behavior4/5

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

Discloses calculation logic (volumetric factor 6000 vs 5000), industry standards (IATA), and interprets output meaning (ratio >1.0 = volumetric) despite no output schema or annotations.

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?

Well-structured with front-loaded summary, logical flow from concept to usage to interpretation; no redundant sentences.

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

Completeness5/5

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

Comprehensive given no output schema: explains return value interpretation (ratio meanings) and covers all business logic needed for an agent to understand and present results.

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?

Schema has 100% coverage, but description adds crucial business context for 'factor' parameter (IATA standard vs DHL 5000) and explains dimensional weight concept beyond raw parameter definitions.

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?

Clear specific purpose ('Calculate air freight chargeable weight') with explicit domain context (airlines, IATA standards) that distinguishes it from sibling cbm_calculator or container tools.

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?

Explicit 'Use this tool when...' bullet list covers quoting, volume/weight determination, and carrier comparison, though lacks explicit 'when not to use' or alternative suggestions.

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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