Duplicate an existing project with a new name.
AI agents use gns3_duplicate_project to create or update resources in GNS3 Network Simulator MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your GNS3 Network Simulator MCP Server environment.
The tool creates/duplicates data (a GNS3 project) which is a write operation. It is reversible (the duplicate can be deleted), so it does not qualify as Destructive. The blast radius is medium because misconfigured duplication could consume storage or lead to confusion about which project is active, but no permanent loss or financial impact is involved.
From the tool's definition Tool description states 'Duplicate an existing project with a new name' — this creates a new copy of project data, a reversible write operation.
Documented attack patterns abuse exactly the kind of access gns3_duplicate_project gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GNS3 Network Simulator MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for gns3_duplicate_project:
{
"version": "1",
"default": "deny",
"tools": {
"gns3_duplicate_project": {
"limits": [
{
"counter": "gns3_duplicate_project_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}gns3_duplicate_project stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Duplicate an existing project with a new name. It is categorised as a Write tool in the GNS3 Network Simulator MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the GNS3 Network Simulator MCP Server MCP server in PolicyLayer and add a rule for gns3_duplicate_project: 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 GNS3 Network Simulator MCP Server. Nothing to install.
gns3_duplicate_project is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the gns3_duplicate_project 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.
Set action: deny in the PolicyLayer policy for gns3_duplicate_project. 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.
gns3_duplicate_project is provided by the GNS3 Network Simulator MCP Server MCP server (wael-rd/gns3-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from GNS3 Network Simulator MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
42 GNS3 Network Simulator MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.