delete_entity
Remove an entity and its relationships from the knowledge graph to manage Infrastructure-as-Code components.
Instructions
Remove an entity and its relationships from the knowledge graph
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| id | Yes | Entity ID |
Implementation Reference
- The MCP tool handler for delete_entity. It validates, logs the operation, calls execute_delete_entity, and handles errors by raising McpError.
async def handle_delete_entity(db: Any, arguments: Dict[str, Any], operation_id: str) -> list[types.TextContent | types.ImageContent | types.EmbeddedResource]: """Handle delete_entity tool.""" try: logger.info( "Deleting entity", extra={ "entity_id": arguments.get("entity_id"), "operation_id": operation_id, }, ) # Execute deletion return execute_delete_entity(db, arguments) except Exception as e: error_msg = f"Failed to delete entity: {str(e)}" logger.error(error_msg, extra={"operation_id": operation_id}) raise McpError( types.ErrorData( code=types.INTERNAL_ERROR, message=error_msg, data={ "tool": "delete_entity", "operation_id": operation_id, }, ) ) - JSON schema defining the input parameters for the delete_entity tool, requiring an 'id' string.
"delete_entity": { "type": "object", "description": "Remove an entity and its relationships from the knowledge graph", "required": ["id"], "properties": {"id": {"type": "string", "description": "Entity ID"}}, }, - src/iac_memory_mcp_server/tools/entity.py:150-155 (registration)Dictionary registering the delete_entity tool handler along with other entity tools.
entity_tool_handlers = { "create_entity": handle_create_entity, "update_entity": handle_update_entity, "delete_entity": handle_delete_entity, "view_relationships": handle_view_relationships, } - Helper function called by the handler to perform the deletion logic, invoking the core delete_entity function and returning a TextContent response.
def execute_delete_entity( db: DatabaseManager, arguments: Dict[str, Any] ) -> List[TextContent]: """Execute delete entity operation.""" logger.info("Deleting entity", extra={"args": arguments}) success = delete_entity(db, arguments["id"]) if not success: raise DatabaseError(f"Entity not found: {arguments['id']}") return [TextContent(type="text", text=f"Deleted entity {arguments['id']}")] - Core database operation that deletes observations and the entity from the SQLite database, returning success boolean.
def delete_entity(db: DatabaseManager, entity_id: str) -> bool: """Delete an entity and its related observations.""" try: with db.get_connection() as conn: conn.execute("BEGIN TRANSACTION") conn.execute("DELETE FROM observations WHERE entity_id = ?", (entity_id,)) cursor = conn.execute("DELETE FROM entities WHERE id = ?", (entity_id,)) affected = cursor.rowcount > 0 conn.commit() return affected except sqlite3.Error as e: raise DatabaseError(f"Delete failed: {str(e)}")