Create a new GNS3 project.
AI agents use gns3_create_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.
Creating a new project is a write operation that adds data to the system in a reversible manner (projects can be deleted). It does not delete data (not Destructive), execute arbitrary code (not Execute), or transfer funds (not Financial). The medium severity reflects that while creating unwanted projects consumes resources and could clutter the system, the impact is limited and reversible.
From the tool's definition The tool name is 'gns3_create_project' and the description states it will 'Create a new GNS3 project.' This creates a new persistent artifact (a project) in the GNS3 system that can be modified or deleted later, making it a Write operation that establishes…
Documented attack patterns abuse exactly the kind of access gns3_create_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_create_project:
{
"version": "1",
"default": "deny",
"tools": {
"gns3_create_project": {
"limits": [
{
"counter": "gns3_create_project_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}gns3_create_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.
Free to start. No card required.
Create a new GNS3 project. 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_create_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_create_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_create_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_create_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_create_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.