Generates a PCB stackup cross-section diagram and opens it in draw.io.
AI agents use create_pcb_stackup to create or update resources in Drawio Engineering — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Drawio Engineering environment.
This tool creates a new diagram (Write action) without permanent data loss, irreversibility, code execution, or financial impact. The output is a visual engineering design document that can be edited or deleted. The blast radius of misuse is minimal—an agent could generate unwanted diagrams, but these are easily discarded and pose no destructive or operational risk.
From the tool's definition Tool generates and creates a PCB stackup diagram, which is a new document/design artifact created in draw.io. The description uses 'generates' indicating content creation.
Documented attack patterns abuse exactly the kind of access create_pcb_stackup gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Drawio Engineering, and nothing reaches the server without passing your rules. This is the rule we recommend for create_pcb_stackup:
{
"version": "1",
"default": "deny",
"tools": {
"create_pcb_stackup": {
"limits": [
{
"counter": "create_pcb_stackup_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_pcb_stackup 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.
Generates a PCB stackup cross-section diagram and opens it in draw.io. It is categorised as a Write tool in the Drawio Engineering MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Drawio Engineering MCP server in PolicyLayer and add a rule for create_pcb_stackup: 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 Drawio Engineering. Nothing to install.
create_pcb_stackup 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 create_pcb_stackup 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 create_pcb_stackup. 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.
create_pcb_stackup is provided by the Drawio Engineering MCP server (rfingadam/drawio-engineering-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Drawio Engineering, 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.
10 Drawio Engineering tools catalogued and risk-classified — across an index of 43,000+ MCP servers.