---
title: "Tool Error Hierarchy"
method: GET
path: "/api/v1/admin/mcp-observability/tool-error-hierarchy"
tags: ["Admin APIs", "MCP Observability"]
---

# Tool Error Hierarchy

`GET /api/v1/admin/mcp-observability/tool-error-hierarchy`

## Query parameters

- `start_date` string, date, required
- `end_date` string, date, required
- `tools` string, nullable
- `environment` string, nullable
- `session_type` string, nullable
- `clients` string[], nullable
- `include_internal` boolean

## Response `200`

Successful Response

- HierarchyNode
  - `name` string, required
  - `value` integer
  - `children` HierarchyNode[]

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/carbonarc/apis/carbon-arc-client-admin-api.md) · [All operations](https://skmtc.net/carbonarc/apis/carbon-arc-client-admin-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/carbonarc/carbon-arc-client-admin-api/revisions/a8ca30023371/schema)