# node

A execute tool on the GNS3 MCP Server MCP server.

Agent View of the PolicyLayer registry record for `node`. HTML page: https://policylayer.com/tools/chistokhinsv-gns3-mcp/node

## Facts

- Tool: `node`
- Server: GNS3 MCP Server (`chistokhinsv/gns3-mcp`) — https://policylayer.com/tools/chistokhinsv-gns3-mcp.md
- Homepage: https://github.com/ChistokhinSV/gns3-mcp
- Risk category: Execute (High risk)
- Registry record: grade B, 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": "node",
    "arguments": {}
  }
}
```

## Why node is rated High

GNS3 node management typically involves creating, starting, stopping, or deleting virtual network nodes — spanning Write, Execute, and potentially Destructive operations. Given the sibling tools (console, link, node_file, project) and the server's purpose of network lab automation, a 'node' tool likely manages network node lifecycle including execution of network devices.

From the tool's own definition: "Tool name is 'node' on a GNS3 server that controls network lab automation including nodes, consoles, and SSH. Description is empty/uninformative."

## Use case

AI agents invoke node to trigger actions in GNS3 MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches GNS3 MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "node": {
      "limits": [
        {
          "counter": "node_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on GNS3 MCP Server (15)

- `console` — Execute — https://policylayer.com/tools/chistokhinsv-gns3-mcp/console.md
- `http_client` — Execute — https://policylayer.com/tools/chistokhinsv-gns3-mcp/http-client.md
- `ssh` — Execute — https://policylayer.com/tools/chistokhinsv-gns3-mcp/ssh.md
- `drawing` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/drawing.md
- `gns3_connection` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/gns3-connection.md
- `link` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/link.md
- `my_tool` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/my-tool.md
- `node_file` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/node-file.md
- `project` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/project.md
- `tftp` — Other — https://policylayer.com/tools/chistokhinsv-gns3-mcp/tftp.md
- `notification` — Read — https://policylayer.com/tools/chistokhinsv-gns3-mcp/notification.md
- `project_docs` — Read — https://policylayer.com/tools/chistokhinsv-gns3-mcp/project-docs.md
- `query_resource` — Read — https://policylayer.com/tools/chistokhinsv-gns3-mcp/query-resource.md
- `search_tools` — Read — https://policylayer.com/tools/chistokhinsv-gns3-mcp/search-tools.md
- `export_topology_diagram` — Write — https://policylayer.com/tools/chistokhinsv-gns3-mcp/export-topology-diagram.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=chistokhinsv-gns3-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/chistokhinsv-gns3-mcp