# upload_large_file

使用分片上传方式上传大文件到腾讯云COS，支持断点续传和进度监控

Agent View of the PolicyLayer registry record for `upload_large_file`. HTML page: https://policylayer.com/tools/156554395-tx-cos-mcp/upload-large-file

## Facts

- Tool: `upload_large_file`
- 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: 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": "upload_large_file",
    "arguments": {}
  }
}
```

## Why upload_large_file is rated Medium

This tool creates or modifies data in cloud storage by uploading files. It is reversible (uploaded files can be deleted via delete_object or delete_multiple tools also available on this server). While it modifies remote state, it does not execute arbitrary code, delete data, or move money, so it is classified as Write rather than Execute or Destructive.

From the tool's own definition: "Tool description states '上传大文件到腾讯云COS' (upload large files to Tencent Cloud COS) using multipart upload with resumable transfer and progress monitoring. This is a file creation/upload operation that modifies cloud storage state."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. 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": {
    "upload_large_file": {
      "limits": [
        {
          "counter": "upload_large_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## 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_folders` — Read — https://policylayer.com/tools/156554395-tx-cos-mcp/list-folders.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_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