# mittwald_app_update

Update properties of an app installation. (use upgrade to update the app version)

Agent View of the PolicyLayer registry record for `mittwald_app_update`. HTML page: https://policylayer.com/tools/mittwald-mcp-server/mittwald-app-update

## Facts

- Tool: `mittwald_app_update`
- Server: Mittwald MCP Server (`mittwald/mcp-server`) — https://policylayer.com/tools/mittwald-mcp-server.md
- Homepage: https://github.com/mittwald/mcp-server
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "mittwald_app_update",
    "arguments": {}
  }
}
```

## Why mittwald_app_update is rated Medium

This tool modifies application properties but explicitly does not handle version upgrades (per parenthetical note). Updates to app properties are reversible changes (e.g., configuration settings, environment variables) rather than destructive deletions or irreversible operations.

From the tool's own definition: "Tool name 'mittwald_app_update' and description 'Update properties of an app installation' indicate reversible modification of application configuration settings."

## Use case

AI agents use mittwald_app_update to create or update resources in Mittwald MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mittwald MCP Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Mittwald MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "mittwald_app_update": {
      "limits": [
        {
          "counter": "mittwald_app_update_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Mittwald MCP Server (171)

- `mittwald_app_uninstall` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-app-uninstall.md
- `mittwald_backup_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-backup-delete.md
- `mittwald_backup_schedule_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-backup-schedule-delete.md
- `mittwald_container_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-container-delete.md
- `mittwald_context_reset_session` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-context-reset-session.md
- `mittwald_cronjob_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-cronjob-delete.md
- `mittwald_database_mysql_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-database-mysql-delete.md
- `mittwald_database_mysql_user_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-database-mysql-user-delete.md
- `mittwald_domain_virtualhost_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-domain-virtualhost-delete.md
- `mittwald_extension_uninstall` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-extension-uninstall.md
- `mittwald_mail_address_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-mail-address-delete.md
- `mittwald_mail_deliverybox_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-mail-deliverybox-delete.md
- `mittwald_org_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-org-delete.md
- `mittwald_org_membership_revoke` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-org-membership-revoke.md
- `mittwald_project_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-project-delete.md
- `mittwald_registry_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-registry-delete.md
- `mittwald_sftp_user_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-sftp-user-delete.md
- `mittwald_ssh_user_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-ssh-user-delete.md
- `mittwald_stack_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-stack-delete.md
- `mittwald_user_api_token_revoke` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-user-api-token-revoke.md
- `mittwald_user_ssh_key_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-user-ssh-key-delete.md
- `mittwald_volume_delete` — Destructive — https://policylayer.com/tools/mittwald-mcp-server/mittwald-volume-delete.md
- `mittwald_app_install_wordpress` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-app-install-wordpress.md
- `mittwald_app_open` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-app-open.md
- `mittwald_app_ssh` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-app-ssh.md
- `mittwald_app_upgrade` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-app-upgrade.md
- `mittwald_container_recreate` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-container-recreate.md
- `mittwald_container_restart` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-container-restart.md
- `mittwald_container_run` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-container-run.md
- `mittwald_container_start` — Execute — https://policylayer.com/tools/mittwald-mcp-server/mittwald-container-start.md
- …and 141 more: https://policylayer.com/tools/mittwald-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=mittwald-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/mittwald-mcp-server