Xearno Tools

Hong Kong Profits Tax Calculator

hong_kong_profits_tax

Read-only

Hong Kong profits tax at 8.25%/16.5% for corporations or 7.5%/15% for unincorporated businesses, with the connected-entity election. Hong Kong does not simply charge every company 16.5%. An eligible corporation pays 8.25% on the first HK$2 million of assessable profits and 16.5% above; an eligible sole proprietorship or partnership pays 7.5% and 15%. But only one connected entity can elect the two-tiered rates for a year. This calculator makes that hidden eligibility branch explicit and shows the saving against the full rate.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`profit`	No	Assessable profits (HKD) Enter Hong Kong assessable profits after allowable deductions. Accounting profit, offshore-source questions and loss carry-forwards must be resolved before this figure.
`tiered`	No	Can this entity use the two-tiered rates? Only one connected entity may elect the two-tiered rates in the same year. Control generally means more than 50% of capital, voting rights, or entitlement to capital or profits.	yes
`entityType`	No	Entity type	corporation

TDQS

A4.1/5.0

Behavior4/5

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

The description adds behavioral context beyond the readOnlyHint annotation by detailing the calculation logic, the connected-entity branch, and that it shows savings against the full rate. It does not contradict the annotations and gives a clear sense of how the tool behaves.

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

Conciseness4/5

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

The description is five sentences and front-loaded with the key rate information. Most sentences add value, but the second sentence ('Hong Kong does not simply charge every company 16.5%') partially restates the first, making the description slightly longer than necessary. Overall it is well-structured and informative.

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?

With no output schema, the description gives a reasonable indication of output by stating it 'shows the saving against the full rate.' It covers the key calculation inputs and the connected-entity election context, while the parameter schema handles input semantics. The tool is adequately complete for a calculator.

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?

The input schema already describes all three parameters with 100% coverage, so the baseline is 3. The description reinforces the meaning of the 'tiered' parameter by explaining the two-tiered rates and the connected entity election, but does not add syntax or format details beyond what the schema provides.

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 that this is a Hong Kong profits tax calculator with specific rates for corporations and unincorporated businesses, and it highlights the two-tiered rate system and connected-entity election. This differentiates it from generic income tax calculators and makes the tool's purpose unambiguous.

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 provides strong contextual guidance about when to use the tool by explaining the eligibility nuance for the two-tiered rates and the connected-entity election. However, it does not explicitly name alternative tools or state when not to use this calculator, such as distinguishing it from income_tax_hong_kong.

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

A3.9/5.0

Disambiguation4/5

Each tool targets a distinct niche (e.g., specific country tax rules, loan types, or legal calculations), with detailed descriptions that clarify boundaries. However, the large number of tools (66) could cause some confusion for an agent trying to select the right one for a general query, especially when multiple tools relate to the same country.

Naming Consistency4/5

Tool names follow a mostly predictable pattern: lowercase words separated by underscores, often starting with a country name (e.g., 'uk_stamp_duty_sdlt') or a topic (e.g., 'compound_growth'). There are minor deviations, such as abbreviations ('npv_irr', 'sip') and varying use of verbs, but overall the naming is clear and consistent.

Tool Count3/5

At 66 tools, the server is unusually large and covers an extensive range of financial and legal calculators. While each tool justifies its existence, the count exceeds the typical well-scoped range (3–15), making the server feel bloated. A more modular design might improve coherence.

Completeness4/5

The tool set covers a wide array of domains: personal income taxes, property taxes, loan calculations, investment returns, and specific country regulations. Minor gaps exist (e.g., missing tools for corporate taxes, general retirement planning, or insurance), but the overall coverage is thorough and addresses many niche scenarios that general AI handles poorly.

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