# app_list

List installed .0n applications from ~/.0n/apps/. Example: app_list({})

Agent View of the PolicyLayer registry record for `app_list`. HTML page: https://policylayer.com/tools/io-github-0nork-0nmcp/app-list

## Facts

- Tool: `app_list`
- Server: 0nmcp (`0nmcp`) — https://policylayer.com/tools/io-github-0nork-0nmcp.md
- Install: `npx -y 0nmcp`
- Homepage: https://github.com/0nork/0nMCP
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why app_list is rated Low

This tool retrieves information about installed applications from a local filesystem directory. It performs a query/list operation that does not modify, execute, or delete anything. The action is purely informational and has no external effects beyond returning data to the caller.

From the tool's own definition: "Tool name is 'app_list' and description states it 'List[s] installed .0n applications from ~/.0n/apps/'. The verb 'list' and the read-only nature of querying a local directory for installed applications indicate data retrieval with no side effects."

## Use case

AI agents call app_list to retrieve information from 0nmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches 0nmcp:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "app_list": {}
  }
}
```

## Other tools on 0nmcp (217)

- `crm_marketplace_delete_charge` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-marketplace-delete-charge.md
- `crm_marketplace_uninstall` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-marketplace-uninstall.md
- `crm_media_bulk_delete` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-media-bulk-delete.md
- `crm_media_delete` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-media-delete.md
- `patent_watchlist` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/patent-watchlist.md
- `shadcn_theme` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/shadcn-theme.md
- `vault_container_revoke` — Destructive — https://policylayer.com/tools/io-github-0nork-0nmcp/vault-container-revoke.md
- `ai_chat` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/ai-chat.md
- `ai_embed` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/ai-embed.md
- `ai_generate` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/ai-generate.md
- `api_call` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/api-call.md
- `app_build` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/app-build.md
- `app_open` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/app-open.md
- `brain_compile` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/brain-compile.md
- `brain_import` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/brain-import.md
- `brain_train` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/brain-train.md
- `council_debate` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/council-debate.md
- `council_solve` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/council-solve.md
- `crm_build_ai_workflow` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-build-ai-workflow.md
- `crm_deploy_snapshot` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-deploy-snapshot.md
- `crm_run_ai_workflow` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/crm-run-ai-workflow.md
- `execute` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/execute.md
- `flow_run_now` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/flow-run-now.md
- `landing_pages_deploy` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/landing-pages-deploy.md
- `plugin_build` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/plugin-build.md
- `plugin_execute` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/plugin-execute.md
- `rc_sequence_to_user_workflow` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/rc-sequence-to-user-workflow.md
- `run_workflow` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/run-workflow.md
- `site_run` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/site-run.md
- `training_feed` — Execute — https://policylayer.com/tools/io-github-0nork-0nmcp/training-feed.md
- …and 187 more: https://policylayer.com/tools/io-github-0nork-0nmcp.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`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-0nork-0nmcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-0nork-0nmcp