Jet Tracker

Total cost of ownership (comparator)

jt_compute_tco

Read-onlyIdempotent

Total cost of ownership across FIVE operating models (own, fractional, charter, jetcard, invest + charter) for a model with a full cost profile, given hours per year, horizon and opportunity rate: average annual and hourly cost, undiscounted horizon total, NPV and the year-by-year cashflows of every scenario (sign convention: outflows negative), plus assumptions (variable per hour and fixed per year from the SAME canonical cost engine as jt_model_specs, costModelVersion, fractional hours included). Accepts the catalog slug or any alias (phenom-300, embraer-phenom-300e, hawker 400xp); comparadorProfiles in jt_model_search lists the five profiles. Values in USD; Brazilian opportunity rate (CDI/Selic) by default.

Input Schema

TableJSON Schema

Name	Required	Description
`slug`	Yes	Modelo com calculadora completa: slug de catálogo (phenom-100, embraer-phenom-300, beechcraft-hawker-400xp, leonardo-aw109-power, airbus-h125), slug do perfil (embraer-phenom-100, leonardo-aw109), alias, família ou nome. A resposta diz em model qual perfil foi usado.
`horizonYears`	No	Horizonte da comparação em anos: 1, 3, 5 ou 10. Default 5.
`hoursPerYear`	Yes	Horas voadas por ano (10-600, limite do comparador).
`opportunityRatePct`	No	Taxa de oportunidade do capital (CDI/Selic). Default 12% BR 2026.

Output Schema

TableJSON Schema

Name	Required	Description
`code`	No	Machine-readable error code (INTERNAL, TIMEOUT, INVALID_ARGUMENT, NOT_FOUND, TOOL_FAILED, ACCOUNT_KEY_REQUIRED).
`_meta`	No
`error`	No
`found`	No
`gated`	No
`requestId`	No
`retryable`	No
`quota_exceeded`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 28, 2026

changedOutput schema / properties / _meta / required

Previous value: -[
-  "tool",
-  "tier",
-  "source",
-  "asOf",
-  "gated",
-  "via"
-]New value: +[
+  "tool",
+  "source",
+  "asOf",
+  "gated",
+  "via"
+]

Changed12 schema fields changedSep 16, 2026

changedInput schema / properties / slug / description

Previous value: -"Slug de modelo com calculadora completa: embraer-phenom-100, embraer-phenom-300, beechcraft-hawker-400xp, leonardo-aw109 ou airbus-h125."New value: +"Modelo com calculadora completa: slug de catálogo (phenom-100, embraer-phenom-300, beechcraft-hawker-400xp, leonardo-aw109-power, airbus-h125), slug do perfil (embraer-phenom-100, leonardo-aw109), alias, família ou nome. A resposta diz em model qual perfil foi usado."

removedInput schema / properties / slug / enum

Removed value: -[
-  "embraer-phenom-100",
-  "embraer-phenom-300",
-  "beechcraft-hawker-400xp",
-  "leonardo-aw109",
-  "airbus-h125"
-]

addedInput schema / properties / slug / maxLength
```
Added value: +80
```
addedInput schema / properties / slug / minLength
```
Added value: +2
```
addedOutput schema / properties / _meta / properties / asOf / description
```
Added value: +"Alias of sourceUpdatedAt (kept for compatibility)."
```

addedOutput schema / properties / _meta / properties / generatedAt

Added value: +{
+  "description": "When this response was produced (ISO 8601).",
+  "type": "string"
+}

addedOutput schema / properties / _meta / properties / observedAt

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Last event actually observed in the data returned (last flight, last arrival, last listing sighting)."
+}

addedOutput schema / properties / _meta / properties / sourceUpdatedAt

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Last sync of the underlying source (RAB snapshot, registry import, listing scan). Never in the future."
+}

addedOutput schema / properties / _meta / properties / validUntil

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Expiry of the fact returned, when it has one (CVA validity, period end)."
+}

addedOutput schema / properties / code

Added value: +{
+  "description": "Machine-readable error code (INTERNAL, TIMEOUT, INVALID_ARGUMENT, NOT_FOUND, TOOL_FAILED, ACCOUNT_KEY_REQUIRED).",
+  "type": "string"
+}

addedOutput schema / properties / requestId
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / retryable
```
Added value: +{
+  "type": "boolean"
+}
```

First observedSep 11, 2026

TDQS

A4.5/5.0

Behavior5/5

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

Annotations already declare read-only/idempotent/no-destruction, and the description adds substantial context beyond them: the exact output set (annual and hourly averages, horizon total, NPV, year-by-year cashflows), the sign convention (outflows negative), the assumptions block, the costModelVersion, and the default Brazilian opportunity rate. This is rich disclosure for a pure-read comparator.

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

Conciseness3/5

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

Purpose is front-loaded, but the entire specification is crammed into one run-on sentence of roughly 130 words mixing inputs, outputs, assumptions, aliasing and currency. Every clause is informative, yet the structure makes it hard to parse, so conciseness is only adequate.

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?

For a four-parameter, read-only comparator with an output schema, the description covers everything an agent needs: valid input domain, prerequisite cost profile, alias acceptance, currency and default rate, output contents and sign convention, plus cross-references to the sibling tools that supply profiles and specs.

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 3 is the baseline, but the description adds real meaning: it confirms alias tolerance with concrete examples (phenom-300, embraer-phenom-300e, hawker 400xp) and notes that the response reports which profile was actually used via its model field. The hours/horizon/rate semantics themselves are already fully covered by 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?

States a specific verb+resource (compute total cost of ownership) and pinpoints the exact scope: five operating models on a model with a full cost profile. It distinguishes itself from siblings by naming jt_model_specs as the shared cost engine and jt_model_search as the source of comparadorProfiles, so an agent can place it precisely in the toolset.

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?

Gives a clear prerequisite — the model must have a full cost profile — and routes the agent to jt_model_search (comparadorProfiles) to discover the five valid profiles. It never states when NOT to use it or contrasts it with jt_trip_cost, so the guidance is contextual rather than exclusionary.

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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