mcp-server

Compare Scenarios

compare_scenarios

Read-only

Side-by-side comparison of 2-8 jurisdictions across every wealth-protection dimension at once: tax (income/CGT/inheritance/wealth top rates + territorial-vs-worldwide + special regimes), crypto-asset treatment, tax-residence day-count, trust/foundation structure availability, reporting (CRS/EU-list/DAC6) and succession/forced-heirship. The synthesis view over the tax, residence, structure, reporting and succession layers. Pass scenarios as an array of {cc,pathway} or cc as a comma list (e.g. AE,PT,SG). Informational only, not advice; combine with the immigration route and a specific double-tax-treaty corridor for the full picture.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`cc`	No	ISO 3166-1 alpha-2 country code, uppercase (e.g. "PT" Portugal, "AE" United Arab Emirates, "KN" St Kitts and Nevis).
`scenarios`	No	Array of scenario objects to compare side by side, each naming a programme id and the family composition and options to price.

Output Schema

TableJSON Schema

Name	Required	Description
`error`	No	Present only when the request could not be fulfilled.
`terms`	No	Acceptable-use and information-not-advice terms.
`source`	No	Attribution for the data, when it is not Mirabello Consultancy itself.
`book_url`	No	Link to request a consultation with a Mirabello specialist, for a personal case.
`provider`	No	Always "Mirabello Consultancy".
`disclaimer`	No	Information, not legal/tax/financial/immigration advice; figures indicative.
`data_updated`	No	Date the underlying dataset was last updated.

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 8, 2026

removedOutput schema / properties / book_a_consultation

Removed value: -{
-  "description": "URL to book a Mirabello consultation.",
-  "type": "string"
-}

addedOutput schema / properties / book_url

Added value: +{
+  "description": "Link to request a consultation with a Mirabello specialist, for a personal case.",
+  "type": "string"
+}

changedOutput schema / properties / source / description

Previous value: -"Attribution for the data."New value: +"Attribution for the data, when it is not Mirabello Consultancy itself."

Changed3 schema fields changedSep 23, 2026

addedInput schema / properties / cc / description

Added value: +"ISO 3166-1 alpha-2 country code, uppercase (e.g. \"PT\" Portugal, \"AE\" United Arab Emirates, \"KN\" St Kitts and Nevis)."

addedInput schema / properties / cc / examples
```
Added value: +[
+  "PT",
+  "AE"
+]
```

addedInput schema / properties / scenarios / description

Added value: +"Array of scenario objects to compare side by side, each naming a programme id and the family composition and options to price."

Changed1 schema field changedJul 27, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "description": "Mirabello response envelope. Tool-specific fields vary; the provenance/disclaimer envelope is always present.",
+  "properties": {
+    "book_a_consultation": {
+      "description": "URL to book a Mirabello consultation.",
+      "type": "string"
+    },
+    "data_updated": {
+      "description": "Date the underlying dataset was last updated.",
+      "type": "string"
+    },
+    "disclaimer": {
+      "description": "Information, not legal/tax/financial/immigration advice; figures indicative.",
+      "type": "string"
+    },
+    "error": {
+      "description": "Present only when the request could not be fulfilled.",
+      "type": "string"
+    },
+    "provider": {
+      "description": "Always \"Mirabello Consultancy\".",
+      "type": "string"
+    },
+    "source": {
+      "description": "Attribution for the data.",
+      "type": "string"
+    },
+    "terms": {
+      "description": "Acceptable-use and information-not-advice terms.",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

AddedJun 27, 2026

TDQS

A4.2/5.0

Behavior4/5

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

Annotations already cover the safety profile (readOnlyHint true, destructiveHint false, openWorldHint false). The description adds real behavioral context beyond them: the 2-8 jurisdiction bound, the 'informational only, not advice' caveat, and the recommendation to pair with other tools.

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?

Front-loads the core action and scope, then the synthesis positioning, then input formats and disclaimers. The dimension enumeration is long but each item earns its place by defining comparison coverage.

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?

With an output schema present, return values needn't be explained, and annotations cover safety. The description fully supplies scope, input formats, limits, the informational disclaimer, and complementary tools, leaving nothing an agent needs missing.

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 coverage is 100%, so the schema already documents both cc and scenarios. The description adds the accepted input shape ('array of {cc,pathway} or cc as a comma list'), which slightly extends the schema's single-string cc, but otherwise largely restates what is structured.

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?

Names a specific verb (compare) and resource (2-8 jurisdictions/scenarios) and enumerates the exact dimensions covered. The phrase 'synthesis view over the tax, residence, structure, reporting and succession layers' cleanly distinguishes it from single-layer siblings like compare_programmes, compare_formation and compare_treaty_position.

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?

Positions the tool as the multi-layer synthesis over the other compare tools and advises combining with 'the immigration route and a specific double-tax-treaty corridor for the full picture'. That is clear contextual guidance, but it never states an explicit when-not or names a competing sibling to route away from.

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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