# MCP tool reference

1 callable tools.

Use tools/call at https://mcp.schedulerzero.com/mcp with the exact tool name and arguments below. The /tools/ paths in this view are documentation identifiers, not HTTP endpoints. Request execution is disabled for this reference.

Inputs are shown for personal API keys (bound) and for OAuth/delegated agents. Output schemas describe MCP structuredContent: native objects pass through; arrays, scalars and null use a data wrapper. Text content retains the native JSON result.

[Connect a client](/mcp/connect) · [Authentication and authorization](/authentication) · [Generated auth guide](/auth.md) · [Download tool catalog](/mcp-catalog.json) · [Agent documentation](/llms.txt)

## inspect_domain_nameservers

Read provider-assigned nameservers and recursive DNS evidence for one authorized Workspace domain.

Inspect nameserver assignment coverage, stored DNS provider and observed NS values. This is read-only.

Do not treat recursive DNS or a historical application timestamp as verified parent or registrar delegation. This cannot change nameservers or provision zones.

Scopes: domain:read

Risk: read; confirmation: none; idempotency: none.

### Input schema (personal API key)

```json
{
  "type": "object",
  "properties": {
    "workspaceId": {
      "type": "string",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
      "format": "uuid"
    },
    "hostname": {
      "type": "string",
      "maxLength": 253
    }
  },
  "required": [
    "workspaceId",
    "hostname"
  ],
  "patternProperties": {
    "^(?!(?:workspaceId|hostname)$)[\\s\\S]*$": false
  },
  "additionalProperties": true,
  "propertyNames": {
    "type": "string",
    "enum": [
      "workspaceId",
      "hostname"
    ]
  }
}
```

### Input schema (OAuth / delegated agent)

```json
{
  "type": "object",
  "properties": {
    "workspaceId": {
      "type": "string",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
      "format": "uuid"
    },
    "hostname": {
      "type": "string",
      "maxLength": 253
    }
  },
  "required": [
    "workspaceId",
    "hostname"
  ],
  "patternProperties": {
    "^(?!(?:workspaceId|hostname)$)[\\s\\S]*$": false
  },
  "additionalProperties": true,
  "propertyNames": {
    "type": "string",
    "enum": [
      "workspaceId",
      "hostname"
    ]
  }
}
```

### Output schema (structuredContent)

```json
{
  "type": "object",
  "properties": {
    "hostname": {
      "type": "string"
    },
    "dnsProvider": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "expected": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "appliedAt": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "observed": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "observationSource": {
      "type": "string",
      "enum": [
        "recursive_dns"
      ]
    },
    "observationStatus": {
      "type": "string",
      "enum": [
        "observed",
        "unavailable"
      ]
    },
    "checkedAt": {
      "type": "string"
    },
    "comparison": {
      "type": "string",
      "enum": [
        "matches",
        "differs",
        "unknown"
      ]
    },
    "delegation": {
      "type": "string",
      "enum": [
        "unknown"
      ]
    },
    "registrarDomainId": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": [
    "hostname",
    "dnsProvider",
    "expected",
    "appliedAt",
    "observed",
    "observationSource",
    "observationStatus",
    "checkedAt",
    "comparison",
    "delegation",
    "registrarDomainId"
  ],
  "additionalProperties": true
}
```

### Underlying API operations

- `infrastructure.nameservers`: `GET /v1/workspaces/:workspaceId/infrastructure/domains/:hostname/nameservers`