---
title: "tool si.view.oldest"
description: "a kind, a place, and how many: those units, each with its reason and since when."
section: reference
address: /reference/tools/si-view-oldest
contract: 0476e35e6e275db5
---

# tool si.view.oldest

a kind, a place, and how many: those units, each with its reason and since when.

[figure: Over MCP, si.view.oldest takes OldestInput and returns a card whose body is [Oldest].]

those units, each with its reason and since when. The call needs the read grant at the user rung.



| | |
|---|---|
| input | [OldestInput](/concepts/oldestinput) |
| result | a card whose body is [Oldest](/concepts/oldest) |
| read-only | yes |
| destructive | no |
| card address | `ui://scale-intelligence/cards/Oldest` |
| HTTP route | [`/v1/view/oldest`](/reference/view/oldest) |





| field | type | required | note |
|---|---|---|---|
| `kind` | [Kind](/concepts/kind) | yes |  |
| `place` | `text` | yes |  |