Mirabello Immigration Intelligence

Withholding Map

withholding_map

Read-onlyIdempotent

Treaty withholding-tax rates (dividends/interest/royalties) for a from→to corridor.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "from": "<from>",
      "to": "<to>"
    },
    "name": "withholding_map"
  }
}

Input Schema

Name	Required	Description	Default
`to`	Yes	End of the date range, ISO date (YYYY-MM-DD).
`from`	Yes	Start of the date range, ISO date (YYYY-MM-DD).

Output Schema

Name	Required	Description	Default
`error`	No
`terms`	No
`source`	No
`book_url`	No
`provider`	No
`disclaimer`	No
`data_updated`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed8 schema fields changedOct 25, 2026

changedOutput schema / description

Previous value: -"Mirabello response envelope. Tool-specific fields vary; the provenance/disclaimer envelope is always present."New value: +"Mirabello envelope; tool fields vary; error only on failure."

removedOutput schema / properties / book_url / description

Removed value: -"Link to request a consultation with a Mirabello specialist, for a personal case."

removedOutput schema / properties / data_updated / description

Removed value: -"Date the underlying dataset was last updated."

removedOutput schema / properties / disclaimer / description

Removed value: -"Information, not legal/tax/financial/immigration advice; figures indicative."

removedOutput schema / properties / error / description

Removed value: -"Present only when the request could not be fulfilled."

removedOutput schema / properties / provider / description
```
Removed value: -"Always \"Mirabello Consultancy\"."
```

removedOutput schema / properties / source / description

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

removedOutput schema / properties / terms / description

Removed value: -"Acceptable-use and information-not-advice terms."

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."

Changed4 schema fields changedSep 23, 2026
- addedInput schema / properties / from / description
```
Added value: +"Start of the date range, ISO date (YYYY-MM-DD)."
```
- addedInput schema / properties / from / examples
```
Added value: +[
+  "2026-01-01"
+]
```
- addedInput schema / properties / to / description
```
Added value: +"End of the date range, ISO date (YYYY-MM-DD)."
```
- addedInput schema / properties / to / examples
```
Added value: +[
+  "2026-12-31"
+]
```

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

C2.9/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds only the income-type scope (dividends/interest/royalties), which is genuinely useful context about what the result covers, but says nothing about rate vintage, treaty-absence behaviour, or jurisdictional coverage.

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?

A single front-loaded sentence with no filler. It is efficient, though arguably over-terse given the semantic ambiguity it leaves unresolved around the two required parameters.

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

Completeness2/5

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

An output schema and rich annotations remove the need to explain returns and safety, but the description never resolves the central question of what 'from' and 'to' actually mean, and gives no fallback behaviour for missing treaties. For a two-required-parameter lookup whose schema text points the other way, that gap matters.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline would be 3, but the description actively conflicts with the schema: it frames 'from→to' as a jurisdiction corridor while the schema describes both parameters as ISO date range bounds with examples 2026-01-01/2026-12-31. That contradiction is more likely to mislead an agent than to help it.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb-less but precise resource: treaty withholding-tax rates for dividends/interest/royalties on a from→to corridor. The domain and the three income categories are concrete. It stops short of differentiating from sibling tools such as compare_treaty_position or get_country_tax, so an agent cannot be fully sure which to pick.

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 rather than compare_treaty_position (a close sibling) or get_country_tax. There is no statement of prerequisites, no mention of what happens when no treaty exists, and no exclusions. The agent must infer usage purely from the one-line scope.

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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