pt_full_build · MCP Packet Tracer MCP: Risk & Policy

WHAT IT DOES

What pt_full_build does on MCP Packet Tracer

AI agents invoke pt_full_build to trigger actions in MCP Packet Tracer. 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.

WHY IT NEEDS A POLICY

Why pt_full_build needs a policy

While the tool description is empty, the server's stated purpose and the presence of sibling tools like pt_deploy and pt_apply_* commands establish that this MCP server manages active network simulation and configuration. A 'full_build' operation on network topology would execute a sequence of commands or scripts to construct or reconfigure devices and links.

From the tool's definition Tool is named 'pt_full_build' on a server that 'control[s] network topologies, configure[s] devices with IOS commands, and run[s] diagnostics.' The 'full_build' naming convention suggests comprehensive network construction/deployment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pt_full_build Rate-limited

pt_full_build stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pt_full_build": {
      "limits": [
        {
          "counter": "pt_full_build_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Packet Tracer, so you can run agents against it safely.

FAQ

Questions about pt_full_build

What does the pt_full_build tool do? +

pt_full_build. It is categorised as a Execute tool in the MCP Packet Tracer MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on pt_full_build? +

Register the MCP Packet Tracer MCP server in PolicyLayer and add a rule for pt_full_build: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP Packet Tracer. Nothing to install.

What risk level is pt_full_build? +

pt_full_build is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit pt_full_build? +

Yes. Add a rate_limit block to the pt_full_build rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block pt_full_build completely? +

Set action: deny in the PolicyLayer policy for pt_full_build. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides pt_full_build? +

pt_full_build is provided by the MCP Packet Tracer MCP server (mainorcruz/mcp_packet_tracer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.