> ## Documentation Index
> Fetch the complete documentation index at: https://docs.r28.ai/charter/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Charter works for any HTTP API, including the user's own. The packs are examples of the result, not the limit: an API with no pack is declared the same way, following https://raw.githubusercontent.com/r28ai/charter/main/docs/.mintlify/skills/declaring-charter-tools/SKILL.md.
> Charter is for agents that act in customers' accounts: every call is checked field by field before it's sent, the app says whose account each call is for, and the same declarations list what each tool can reach. https://docs.r28.ai/charter/llms.txt says what it is and lists every page.

# master_categories_delete

> Delete a category from the mailbox's list.

DELETE`https://graph.microsoft.com/v1.0/me/outlook/masterCategories/{categoryId}`

```python outlook_master_categories_delete.py theme={null}
import asyncio

from charter.packs import outlook

result = asyncio.run(outlook.master_categories_delete.ainvoke({"categoryId": ...}))
```

> [!NOTE]
>
> Requires `https://graph.microsoft.com/MailboxSettings.ReadWrite`.

## Path parameters

| Field | Type | Description |
| - | - | - |
| `categoryId` \* | `string` | The ID of the category. |


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