# list_folders

列出COS中的文件夹和文件

Agent View of the PolicyLayer registry record for `list_folders`. HTML page: https://policylayer.com/tools/156554395-tx-cos-mcp/list-folders

## Facts

- Tool: `list_folders`
- Server: Tencent Cloud COS MCP Server (`156554395/tx-cos-mcp`) — https://policylayer.com/tools/156554395-tx-cos-mcp.md
- Homepage: https://github.com/156554395/tx-cos-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- 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": "list_folders",
    "arguments": {}
  }
}
```

## Why list_folders is rated Low

This tool performs a query/list operation on cloud storage metadata. It retrieves information about folders and files but does not create, modify, delete, or execute any code. The operation is non-destructive and has no side effects beyond data retrieval. It falls squarely into the Read category with low severity since listing storage contents carries minimal risk even if misused by an AI agent.

From the tool's own definition: "Tool name 'list_folders' and description '列出COS中的文件夹和文件' (list folders and files in COS) indicates a read-only operation that retrieves and enumerates storage objects without modification."

## Use case

AI agents call list_folders to retrieve information from Tencent Cloud COS MCP Server 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 Tencent Cloud COS MCP Server:

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

## Other tools on Tencent Cloud COS MCP Server (16)

- `clear_upload_progress` — Destructive — https://policylayer.com/tools/156554395-tx-cos-mcp/clear-upload-progress.md
- `delete_folder` — Destructive — https://policylayer.com/tools/156554395-tx-cos-mcp/delete-folder.md
- `delete_multiple` — Destructive — https://policylayer.com/tools/156554395-tx-cos-mcp/delete-multiple.md
- `delete_object` — Destructive — https://policylayer.com/tools/156554395-tx-cos-mcp/delete-object.md
- `manage_temp_files` — Destructive — https://policylayer.com/tools/156554395-tx-cos-mcp/manage-temp-files.md
- `get_folder_stats` — Read — https://policylayer.com/tools/156554395-tx-cos-mcp/get-folder-stats.md
- `get_signed_url` — Read — https://policylayer.com/tools/156554395-tx-cos-mcp/get-signed-url.md
- `get_upload_progress` — Read — https://policylayer.com/tools/156554395-tx-cos-mcp/get-upload-progress.md
- `list_objects` — Read — https://policylayer.com/tools/156554395-tx-cos-mcp/list-objects.md
- `copy_object` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/copy-object.md
- `create_folder` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/create-folder.md
- `move_object` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/move-object.md
- `rename_object` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/rename-object.md
- `upload_file` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/upload-file.md
- `upload_large_file` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/upload-large-file.md
- `upload_multiple` — Write — https://policylayer.com/tools/156554395-tx-cos-mcp/upload-multiple.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=156554395-tx-cos-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/156554395-tx-cos-mcp