---
title: "ToolMeta"
description: "what a listed MCP tool carries beside its schema: its row as the register holds it and the release's stamp"
section: concepts
address: /concepts/toolmeta
contract: 0476e35e6e275db5
---

# ToolMeta

what a listed MCP tool carries beside its schema: its row as the register holds it and the release's stamp

[figure: ToolMeta is a value at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | value |
| scope | none |
| key | none |
| store | none |
| family | harness |



## Fields


| field | type | required | note |
|---|---|---|---|
| `tool` | [Tool](/concepts/tool) | yes | the row |
| `register_hash` | `hash` | yes | the register the row is from |
| `built_in_this_release` | `bool` | yes |  |



## Routes that use it
No route takes or returns ToolMeta directly. The record holds it, and the objects that point at it reach it.