Generates an RF signal chain block diagram from a JSON description and opens it in draw.io.
AI agents use create_rf_block_diagram 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.
The tool creates and modifies diagram data (a new RF block diagram) in a reversible manner. This is a Write operation—users can edit, delete, or regenerate diagrams without irreversible consequences. There are no destructive, financial, or execute-level risks (no code execution or external system calls). No data is read from external sources in a sensitive way.
From the tool's definition Tool description states it 'Generates an RF signal chain block diagram' and 'opens it in draw.io', indicating creation of a new diagram artifact.
Documented attack patterns abuse exactly the kind of access create_rf_block_diagram 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_rf_block_diagram:
{
"version": "1",
"default": "deny",
"tools": {
"create_rf_block_diagram": {
"limits": [
{
"counter": "create_rf_block_diagram_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_rf_block_diagram 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 an RF signal chain block diagram from a JSON description 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_rf_block_diagram: 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_rf_block_diagram 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_rf_block_diagram 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_rf_block_diagram. 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_rf_block_diagram 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.