add_entity_facet
Adds an entity facet to IDS specifications to define building elements like walls or doors for compliance with the IDS 1.0 standard.
Instructions
Add an entity facet to a specification.
IMPORTANT: IDS 1.0 allows only ONE entity facet per applicability section. If you need multiple entity types, create separate specifications.
Args: spec_id: Specification identifier location: "applicability" or "requirements" entity_name: IFC entity name (e.g., "IFCWALL") ctx: FastMCP Context (auto-injected) predefined_type: Optional predefined type cardinality: "required", "optional", or "prohibited" (requirements only)
Returns: {"status": "added", "facet_type": "entity", "spec_id": "S1"}
Raises: ToolError: If trying to add second entity to applicability section
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| spec_id | Yes | ||
| location | Yes | ||
| entity_name | Yes | ||
| predefined_type | No | ||
| cardinality | No | required |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Implementation Reference
- src/ids_mcp_server/tools/facets.py:16-81 (handler)The main handler function for the 'add_entity_facet' tool. It adds an entity facet to the specified section (applicability or requirements) of an IDS specification, performs validation, creates the entity using IfcTester's ids.Entity, and handles errors.
async def add_entity_facet( spec_id: str, location: str, entity_name: str, ctx: Context, predefined_type: Optional[str] = None, cardinality: str = "required" ) -> Dict[str, Any]: """ Add an entity facet to a specification. IMPORTANT: IDS 1.0 allows only ONE entity facet per applicability section. If you need multiple entity types, create separate specifications. Args: spec_id: Specification identifier location: "applicability" or "requirements" entity_name: IFC entity name (e.g., "IFCWALL") ctx: FastMCP Context (auto-injected) predefined_type: Optional predefined type cardinality: "required", "optional", or "prohibited" (requirements only) Returns: {"status": "added", "facet_type": "entity", "spec_id": "S1"} Raises: ToolError: If trying to add second entity to applicability section """ try: ids_obj = await get_or_create_session(ctx) spec = _find_specification(ids_obj, spec_id) # EARLY VALIDATION: Check IDS 1.0 constraint validate_single_entity_in_applicability(spec, location) await ctx.info(f"Adding entity facet: {entity_name} to {spec_id}") # Create entity facet using IfcTester entity = ids.Entity( name=entity_name.upper(), predefinedType=predefined_type ) # Add to appropriate section if location == "applicability": spec.applicability.append(entity) elif location == "requirements": # Note: Entity facets in requirements don't have cardinality in IDS spec.requirements.append(entity) else: raise ToolError(f"Invalid location: {location}. Must be 'applicability' or 'requirements'") await ctx.info(f"Entity facet added: {entity_name}") return { "status": "added", "facet_type": "entity", "spec_id": spec_id } except ToolError: raise except Exception as e: await ctx.error(f"Failed to add entity facet: {str(e)}") raise ToolError(f"Failed to add entity facet: {str(e)}") - src/ids_mcp_server/server.py:33-33 (registration)Registers the add_entity_facet function as a tool in the FastMCP server.
mcp_server.tool(facets.add_entity_facet) - src/ids_mcp_server/server.py:5-5 (registration)Imports the facets module which contains the add_entity_facet tool.
from ids_mcp_server.tools import document, specification, facets, validation, restrictions - Imports helper validators used in add_entity_facet, such as validate_single_entity_in_applicability for IDS 1.0 constraints.
from ids_mcp_server.tools.validators import ( validate_single_entity_in_applicability, validate_property_set_required