Opens the draw.io editor with a diagram from XML content.
AI agents use open_drawio_xml 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's function is to instantiate a draw.io editor session with a diagram loaded from XML. This is fundamentally a Write operation because it enables users to create and modify diagrams through the editor interface. While the tool itself may not directly persist changes, it establishes an editing context where modifications are the intended use case.
From the tool's definition Tool opens draw.io editor with diagram from XML content. The verb 'opens' combined with accepting XML input indicates the tool loads and potentially modifies diagram state in the editor.
Documented attack patterns abuse exactly the kind of access open_drawio_xml 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 open_drawio_xml:
{
"version": "1",
"default": "deny",
"tools": {
"open_drawio_xml": {
"limits": [
{
"counter": "open_drawio_xml_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}open_drawio_xml 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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Opens the draw.io editor with a diagram from XML content. 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 open_drawio_xml: 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.
open_drawio_xml 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 open_drawio_xml 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 open_drawio_xml. 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.
open_drawio_xml 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.