function validate( node ) {
		var jsdoc;
		var vfile;
		var ast;

		jsdoc = findJSDoc( source, node );
		if ( isObject( jsdoc ) ) {
			ast = parseJSDoc( jsdoc.value, DOPTS );
			if ( ast.description ) {
				vfile = lint( ast.description );
				if ( vfile.messages.length ) {
					reportErrors( vfile.messages, jsdoc.loc );
				}
			}
		}
	}
Lints JSDoc descriptions.

@private
@param {ASTNode} node - AST node