storybook/docs/snippets/common/component-story-csf-description.js.mdx

```js
// Button.stories.js | Button.stories.ts

export default {
  title: 'CustomDescription',
  parameters: {
    docs: {
      description: {
        component: 'some component _markdown_',
      },
    },
  },
};

export const WithStoryDescription = Template.bind({});
WithStoryDescription.parameters = {
  docs: {
    description: {
      story: 'some story **markdown**',
    },
  },
};
```