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Calculate Dpe Energy Class

calculate_dpe_energy_class
Read-onlyIdempotent

Determine French DPE energy class from primary energy consumption. Returns: {note}. See list_bundles for related 'immobilier' calculators.

Input Schema

NameRequiredDescriptionDefault
kwh_m2_yearYesPrimary energy consumption in kWh/m2/year

Output Schema

NameRequiredDescriptionDefault
resultNoComputed result. Object whose fields depend on the tool (e.g. {tax, marginal_rate, brackets} for tax tools, {volume_l, gallons} for volume tools).
sourceNoAuthoritative source for the rule or formula (e.g. "Article 197 CGI", "NF DTU 21").
formulaNoHuman-readable formula or method used (e.g. "I=P·r·t", "Magnus formula").
reference_urlNoLink to a calcul2 page documenting the calculation in detail.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "http://json-schema.org/draft-07/schema#",
      +  "additionalProperties": false,
      +  "properties": {
      +    "formula": {
      +      "description": "Human-readable formula or method used (e.g. \"I=P·r·t\", \"Magnus formula\").",
      +      "type": "string"
      +    },
      +    "reference_url": {
      +      "description": "Link to a calcul2 page documenting the calculation in detail.",
      +      "type": "string"
      +    },
      +    "result": {
      +      "description": "Computed result. Object whose fields depend on the tool (e.g. {tax, marginal_rate, brackets} for tax tools, {volume_l, gallons} for volume tools)."
      +    },
      +    "source": {
      +      "description": "Authoritative source for the rule or formula (e.g. \"Article 197 CGI\", \"NF DTU 21\").",
      +      "type": "string"
      +    }
      +  },
      +  "type": "object"
      +}
  2. First observed

TDQS

C2.9/5.0
Behavior2/5

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered elsewhere. The description adds no behavioral context of its own, and its one behavioral claim is the unresolved template artifact 'Returns: {note}', which conveys nothing. No contradiction with annotations, but no added value either.

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?

Two short sentences that are front-loaded with the purpose, so size is fine. However, the '{note}' placeholder is an unrendered template fragment that does not earn its place, and the list_bundles pointer is tangential to calling this tool.

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?

One fully documented required parameter, a complete annotation set, and an output schema (so return values need not be explained). The description covers what an agent needs to select and invoke it; the only blemishes are the broken '{note}' fragment and the absence of any DPE domain framing.

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 description coverage is 100% for the single parameter (kwh_m2_year), so the schema fully documents units and meaning. The description's phrase 'primary energy consumption' just restates that, adding no thresholds (e.g. DPE class boundaries) or edge-case semantics. Baseline 3 applies.

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 and resource ('Determine French DPE energy class') plus the driving input (primary energy consumption), which is genuinely distinct from siblings like calculate_malus_ecologique or calculate_energy_physics. It does not name or contrast a particular sibling, so it lands at 4 rather than 5.

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?

The only guidance is 'See list_bundles for related "immobilier" calculators', which is a navigation pointer, not a when-to-use rule. There is no statement of prerequisites, input scope, or when a different calculator would be the right choice.

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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