# update_application_environment

Update environment variables for a runtime application

Agent View of the PolicyLayer registry record for `update_application_environment`. HTML page: https://policylayer.com/tools/cbrown35-20i-mcp/update-application-environment

## Facts

- Tool: `update_application_environment`
- Server: 20i MCP Server (`cbrown35/20i-mcp`) — https://policylayer.com/tools/cbrown35-20i-mcp.md
- Homepage: https://github.com/Cbrown35/20i-MCP
- 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": "update_application_environment",
    "arguments": {}
  }
}
```

## Why update_application_environment is rated Medium

This tool modifies application configuration reversibly through environment variable updates. While not destructive (changes can be reverted), it's more severe than simple data creation because misconfigured environment variables can break applications, expose secrets if logged, or alter security-critical behavior.

From the tool's own definition: "Tool updates environment variables for runtime applications. Environment variables control application behavior, configuration, and often contain secrets (API keys, credentials)."

## Use case

AI agents use update_application_environment to create or update resources in 20i MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 20i MCP Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches 20i MCP Server:

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

## Other tools on 20i MCP Server (301)

- `deactivate_package` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/deactivate-package.md
- `deactivate_vps` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/deactivate-vps.md
- `delete_application` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/delete-application.md
- `delete_cdn_security_headers` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/delete-cdn-security-headers.md
- `delete_easy_builder_instance` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/delete-easy-builder-instance.md
- `delete_hosting_package` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/delete-hosting-package.md
- `delete_mssql_database` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/delete-mssql-database.md
- `delete_package` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/delete-package.md
- `manage_directories` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/manage-directories.md
- `manage_wordpress_plugin` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/manage-wordpress-plugin.md
- `purge_cdn_cache` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/purge-cdn-cache.md
- `rebuild_vps` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/rebuild-vps.md
- `reinstall_software` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/reinstall-software.md
- `reinstall_wordpress` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/reinstall-wordpress.md
- `remove_country_block` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/remove-country-block.md
- `remove_ip_block` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/remove-ip-block.md
- `remove_mssql_user` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/remove-mssql-user.md
- `remove_ssl_certificates` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/remove-ssl-certificates.md
- `remove_stack_user_from_package` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/remove-stack-user-from-package.md
- `remove_subdomain` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/remove-subdomain.md
- `reset_managed_vps_profile` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/reset-managed-vps-profile.md
- `restore_ftp_backup` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/restore-ftp-backup.md
- `restore_snapshot` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/restore-snapshot.md
- `shutdown_vps` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/shutdown-vps.md
- `suspend_package` — Destructive — https://policylayer.com/tools/cbrown35-20i-mcp/suspend-package.md
- `activate_vps` — Execute — https://policylayer.com/tools/cbrown35-20i-mcp/activate-vps.md
- `change_vps_root_password` — Execute — https://policylayer.com/tools/cbrown35-20i-mcp/change-vps-root-password.md
- `clone_wordpress_staging` — Execute — https://policylayer.com/tools/cbrown35-20i-mcp/clone-wordpress-staging.md
- `deploy_application` — Execute — https://policylayer.com/tools/cbrown35-20i-mcp/deploy-application.md
- `deploy_website_complete` — Execute — https://policylayer.com/tools/cbrown35-20i-mcp/deploy-website-complete.md
- …and 271 more: https://policylayer.com/tools/cbrown35-20i-mcp.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=cbrown35-20i-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/cbrown35-20i-mcp