# find_process_by_port

Find which process is using a specific network port.

Agent View of the PolicyLayer registry record for `find_process_by_port`. HTML page: https://policylayer.com/tools/19miha99-system-monitor-mcp/find-process-by-port

## Facts

- Tool: `find_process_by_port`
- Server: Desktop Commander MCP Server (`19miha99/system-monitor-mcp`) — https://policylayer.com/tools/19miha99-system-monitor-mcp.md
- Homepage: https://github.com/19miha99/system-monitor-mcp
- Risk category: Read (Low risk)
- Registry record: grade D, 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": "find_process_by_port",
    "arguments": {}
  }
}
```

## Why find_process_by_port is rated Low

This tool queries system state (which process occupies a port) and returns information—it has no side effects, does not execute commands, does not modify data, and does not trigger external operations. It is purely informational, similar to the sibling tools like get_process_details, get_network_stats, and get_cpu_per_core, all of which are Read category.

From the tool's own definition: "Tool name 'find_process_by_port' and description 'Find which process is using a specific network port' indicate a read-only query operation that retrieves process information without modification or execution of code."

## Use case

AI agents call find_process_by_port to retrieve information from Desktop Commander 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 Desktop Commander MCP Server:

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

## Other tools on Desktop Commander MCP Server (22)

- `kill_process` — Destructive — https://policylayer.com/tools/19miha99-system-monitor-mcp/kill-process.md
- `focus_window` — Execute — https://policylayer.com/tools/19miha99-system-monitor-mcp/focus-window.md
- `launch_application` — Execute — https://policylayer.com/tools/19miha99-system-monitor-mcp/launch-application.md
- `set_window_state` — Execute — https://policylayer.com/tools/19miha99-system-monitor-mcp/set-window-state.md
- `arrange_window` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/arrange-window.md
- `capture_screenshot` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/capture-screenshot.md
- `get_battery_status` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-battery-status.md
- `get_cpu_per_core` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-cpu-per-core.md
- `get_display_info` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-display-info.md
- `get_network_stats` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-network-stats.md
- `get_process_details` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-process-details.md
- `get_startup_programs` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-startup-programs.md
- `get_system_overview` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-system-overview.md
- `get_temperatures` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-temperatures.md
- `get_top_consumers` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/get-top-consumers.md
- `list_processes` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/list-processes.md
- `list_windows` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/list-windows.md
- `read_clipboard` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/read-clipboard.md
- `search_installed_apps` — Read — https://policylayer.com/tools/19miha99-system-monitor-mcp/search-installed-apps.md
- `close_window` — Write — https://policylayer.com/tools/19miha99-system-monitor-mcp/close-window.md
- `send_notification` — Write — https://policylayer.com/tools/19miha99-system-monitor-mcp/send-notification.md
- `write_clipboard` — Write — https://policylayer.com/tools/19miha99-system-monitor-mcp/write-clipboard.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=19miha99-system-monitor-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/19miha99-system-monitor-mcp