Azure Resource Lookup

# Azure Resource Lookup

List, find, and discover Azure resources of any type across subscriptions and resource groups. Use Azure Resource Graph (ARG) for fast, cross-cutting queries when dedicated MCP tools don't cover the resource type.

## When to Use This Skill

Use this skill when the user wants to:
- **List resources** of any type (VMs, web apps, storage accounts, container apps, databases, etc.)
- **Show resources** in a specific subscription or resource group
- Query resources **across multiple subscriptions** or resource types
- Find **orphaned resources** (unattached disks, unused NICs, idle IPs)
- Discover resources **missing required tags** or configurations
- Get a **resource inventory** spanning multiple types
- Find resources in a **specific state** (unhealthy, failed provisioning, stopped)
- Answer "**what resources do I have?**" or "**show me my Azure resources**"
- **List web apps, websites, or App Services**

> ⚠️ **Warning:** App Service / Web Apps have no dedicated MCP `list` command. Prompts like "list websites", "list web apps", or "list app services" **must** route through this skill to use Azure Resource Graph.

> 💡 **Tip:** For single-resource-type queries, first check if a dedicated MCP tool can handle it (see routing table below). If none exists, use Azure Resource Graph.

## Quick Reference

| Property | Value |
|----------|-------|
| **Query Language** | KQL (Kusto Query Language subset) |
| **CLI Command** | `az graph query -q "<KQL>" -o table` |
| **Extension** | `az extension add --name resource-graph` |
| **MCP Tool** | `extension_cli_generate` with intent for `az graph query` |
| **Best For** | Cross-subscription queries, orphaned resources, tag audits |

## MCP Tools

| Tool | Purpose | When to Use |
|------|---------|-------------|
| `extension_cli_generate` | Generate `az graph query` commands | Primary tool — generate ARG queries from user intent |
| `mcp_azure_mcp_subscription_list` | List available subscriptions | Discover subscription scope before querying |
| `mcp_azure_mcp_group_list` | List resource groups | Narrow query scope |

## Workflow

### Step 1: Check for a Dedicated MCP Tool

For single-resource-type queries, check if a dedicated MCP tool can handle it:

| Resource Type | MCP Tool | Coverage |
|---|---|---|
| Virtual Machines | `compute` | ✅ Full — list, details, sizes |
| Storage Accounts | `storage` | ✅ Full — accounts, blobs, tables |
| Cosmos DB | `cosmos` | ✅ Full — accounts, databases, queries |
| Key Vault | `keyvault` | ⚠️ Partial — secrets/keys only, no vault listing |
| SQL Databases | `sql` | ⚠️ Partial — requires resource group name |
| Container Registries | `acr` | ✅ Full — list registries |
| Kubernetes (AKS) | `aks` | ✅ Full — clusters, node pools |
| App Service / Web Apps | `appservice` | ❌ No list command — use ARG |
| Container Apps | — | ❌ No MCP tool — use ARG |
| Event Hubs | `eventhubs` | ✅ Full — namespaces, hubs |
| Service Bus | `servicebus` | ✅ Full — queues, topics |

If a dedicated tool is available with full coverage, use it. Otherwise proceed to Step 2.

### Step 2: Generate the ARG Query

Use `extension_cli_generate` to build the `az graph query` command:

```yaml
mcp_azure_mcp_extension_cli_generate
  intent: "query Azure Resource Graph to <user's request>"
  cli-type: "az"
```

See [Azure Resource Graph Query Patterns](references/azure-resource-graph.md) for common KQL patterns.

### Step 3: Execute and Format Results

Run the generated command. Use `--query` (JMESPath) to shape output:

```bash
az graph query -q "<KQL>" --query "data[].{name:name, type:type, rg:resourceGroup}" -o table
```

Use `--first N` to limit results. Use `--subscriptions` to scope.

## Error Handling

| Error | Cause | Fix |
|-------|-------|-----|
| `resource-graph extension not found` | Extension not installed | `az extension add --name resource-graph` |
| `AuthorizationFailed` | No read access to subscription | Check RBAC — need Reader role |
| `BadRequest` on query | Invalid KQL syntax | Verify table/column names; use `=~` for case-insensitive type matching |
| Empty results | No matching resources or wrong scope | Check `--subscriptions` flag; verify resource type spelling |

## Constraints

- ✅ **Always** use `=~` for case-insensitive type matching (types are lowercase)
- ✅ **Always** scope queries with `--subscriptions` or `--first` for large tenants
- ✅ **Prefer** dedicated MCP tools for single-resource-type queries
- ❌ **Never** use ARG for real-time monitoring (data has slight delay)
- ❌ **Never** attempt mutations through ARG (read-only)