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reference-data

by dev.ausref

compute_vat

PAID ($0.02). VAT breakdown for an amount: net, tax and gross using the country's current statutory rate, including per-levy components where the rate is composite (e.g. Ghana VAT + NHIL + GETFund). mode=add treats the amount as net; mode=extract backs VAT out of a gross amount. Pass api_key if you have one; otherwise the response explains how to pay via x402.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
modeNoadd = amount is net (default); extract = amount is gross
amountYesAmount in the country's own currency
api_keyNoAPI key
countryYesISO country code

TDQS

A4.6/5.0
Behavior5/5

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

Despite no annotations, the description fully discloses that the tool costs $0.02, explains how payment works (api_key or x402), and details the behavioral difference between modes. This is transparent about all key behaviors.

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 concise with no redundant sentences. It front-loads the purpose and payment info, making it easy to parse quickly.

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?

Given no output schema, the description adequately explains return components (net, tax, gross, per-levy) and covers payment. It lacks error handling details but is sufficient for a simple calculation tool.

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 coverage is 100%, so baseline is 3. The description adds value by clarifying that amount is in the country's own currency and that mode defaults to 'add', improving understanding beyond the schema.

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 tool computes VAT breakdown (net, tax, gross) using the country's statutory rate, including per-levy components for composite rates. It distinguishes from siblings like compute_income_tax by being VAT-specific.

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 explains the two modes (add/extract) and when to use each, but does not explicitly state when not to use this tool or provide alternatives among siblings.

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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TDQS

A4.2/5.0
Disambiguation5/5

Each tool targets a distinct domain: wage compliance, income tax, VAT, working days, holidays, series data (current, history, snapshot, catalog), and settlement dates. Even the financial computations (check_minimum_wage, compute_income_tax, compute_vat) have clearly different inputs and purposes, so no two tools are confusable.

Naming Consistency4/5

Most tools follow a clear verb_noun snake_case pattern (check_, compute_, count_, get_, list_). The only exception is `settlement_date`, which is a noun phrase rather than verb-first, but it remains consistent in style and readability. This minor deviation prevents a perfect score.

Tool Count5/5

With 10 tools, the server is well-scoped for a reference-data provider. It balances specific computations (minimum wage, tax, VAT) with general data access (series, holidays, settlements), and each tool serves a clear purpose without overlap or unnecessary bulk.

Completeness5/5

The tool surface comprehensively covers reference data for financial and calendar domains: statutory rates and compliance, holiday and working-day calendars, settlement conventions, and a generic series system with current, historical, snapshot, and catalog access. No obvious gaps impede an agent from accomplishing typical reference-data tasks, and the free list_series enables discovery.

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