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Validate an IFC model

cao_valider_ifc
Read-only

WHEN you need to check an IFC scene without a buildingSMART account. Same scene as cao_generer_ifc. Returns {ok, schema_ifc4, regles, problemes}: IFC4 schema + EXPRESS rules, millimetre units, material layers on every IfcWall, named IfcSpace, thermal conductivity in Pset_MaterialThermal, every element in a storey.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
mursNoWalls: plan segments extruded vertically. Every coordinate in this whole scene is in MILLIMETRES, in a single plan frame whose origin you choose — X to the right, Y upward, Z up from the floor. Keep one consistent origin across murs/boites/plan: the generators never recentre anything for you.
planNo2D reference lines — drawn flat, never extruded and never counted in the quantities. Use them for axes, plot limits or setting-out marks.
boitesNoBoxes (furniture, volumes): a rectangular block placed by its CENTRE, not by a corner. Millimetres, same frame as murs[].
georefNoOptional Lambert-93 (EPSG:2154) false origin for IfcMapConversion. Local millimetres are scaled by 0.001 to CRS metres. Do not invent coordinates: omit est/nord if unknown (origin stays 0). orientation is the angle in degrees of project X from map East, counterclockwise.
cerclesNoCircles on the 2D plan, alongside plan[] lines: each has a centre and a radius, in the same unit as the plan. Use for round shapes a polyline would render badly — fillets, posts, manholes.
reseauxNoPlumbing pipe runs (EF/EC/EU/EV/EP/chauffage) — used only by cao_pdf (technical plan + linear-meter quantities per type).
toituresNoRoofs — used only by cao_pdf. WITHOUT this field: a flat roof is auto-generated over the footprint of ALL walls (legacy default). WITH it: compose freely — each entry can target a subset of walls (via `murs`), letting you build an L-shaped building's roof, or add a dormer on top of a main roof.
plomberieNoSanitary fixtures (sink, WC, shower…) — used only by cao_pdf. Same positioning as electricite.
decorationNoPaint/finish per wall — used only by cao_pdf. Colors the elevations (exterior face) and the axonometric view (face auto-detected by orientation relative to the building's centroid).
ouverturesNoDoors/windows embedded in a wall — used only by cao_pdf (elevations + axonometric view), no effect on dxf/metres.
electriciteNoElectrical symbols (outlets, switches, lights…) — used only by cao_pdf (dedicated technical plan + quantities), no effect on dxf/metres/render. Position: attached to a wall (`mur`+`position`, like ouvertures) or free (`x`,`y`).
compositionsNoNamed wall/slab layer sets declared by the project. A key that matches an inferred kind (mur_exterieur, refend, cloison, plancher, toiture) or murs[].composition drops the Hypothese flag. Each value is {libelle, couches: [{cle, epaisseur?}]}. cle: enduit, bloc_beton, isolant, ba13, ossature, enduit_platre, beton_arme, tuile, charpente, etancheite. Omit epaisseur on the load-bearing layer.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • addedInput schema / properties / murs / items / properties / existant
      Added value: +{
+  "description": "Optional: true for a wall of the EXISTING building when the scene is an extension. cao_permis then counts as created only what the works add.",
+  "type": "boolean"
+}
  2. Changed1 schema field changed
    • changedInput schema / properties / plomberie / items / properties / type / enum
      Previous value: -[
-  "baignoire",
-  "chauffe_eau",
-  "compteur_eau",
-  "douche",
-  "evier",
-  "lavabo",
-  "radiateur",
-  "wc"
-]New value: +[
+  "baignoire",
+  "chauffe_eau",
+  "compteur_eau",
+  "douche",
+  "evier",
+  "lavabo",
+  "module_hydraulique",
+  "pac_exterieure",
+  "radiateur",
+  "wc"
+]
  3. Added

TDQS

A3.7/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. Beyond that, the description adds real value by naming the return shape {ok, schema_ifc4, regles, problemes} and enumerating the specific checks performed (IFC4 schema + EXPRESS rules, mm units, IfcWall material layers, named IfcSpace, thermal conductivity, storey containment).

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?

Three compact sentences: the WHEN condition is front-loaded, the scene relationship is stated, then the return contract. No wasted prose, though the return-field enumeration is slightly terse for a reader unfamiliar with the schema keys.

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 usefully documents the return object and the validation dimensions covered, and the 12-parameter surface is fully specified by the schema. An agent has enough to know purpose, trigger and output, so completeness is strong, with only the generate-vs-validate boundary left implicit.

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%, so the deeply nested murs/boites/toitures/georef parameters are fully documented in the schema itself. The description adds no parameter-level meaning (units, defaults, mode selection) beyond that, so the 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?

The description states a specific verb+resource ('check an IFC scene') and returns structure, and it distinguishes itself from cao_generer_ifc by noting 'Same scene as cao_generer_ifc' and the no-account condition. It stops short of separating itself from other validation-adjacent siblings such as cao_verifier or cao_conflits_ifc, so it is clear but not fully differentiated.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It opens with a WHEN clause ('when you need to check an IFC scene without a buildingSMART account'), which implies the use case, but there is no explicit when-not guidance and no routing to alternatives like cao_generer_ifc (to produce) or cao_conflits_ifc (clash checks). Usage is implied rather than specified.

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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