Export the current diagram to a PNG, SVG, or JSON file.\n\n
AI agents use export_diagram to create or update resources in Excalidraw MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Excalidraw MCP Server environment.
Exporting a diagram to a file is a write operation that creates new data artifacts (output files) in a reversible manner. The tool does not delete, execute arbitrary code, move money, or trigger external side effects beyond file creation. While it outputs data, the act of exporting is fundamentally a write operation that generates new files without destructive consequences.
From the tool's definition Tool description states it exports "the current diagram to a PNG, SVG, or JSON file," which involves creating/writing output files in specified formats.
Documented attack patterns abuse exactly the kind of access export_diagram gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Excalidraw MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for export_diagram:
{
"version": "1",
"default": "deny",
"tools": {
"export_diagram": {
"limits": [
{
"counter": "export_diagram_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}export_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.
Export the current diagram to a PNG, SVG, or JSON file.\n\n. It is categorised as a Write tool in the Excalidraw MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Excalidraw MCP Server MCP server in PolicyLayer and add a rule for export_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 Excalidraw MCP Server. Nothing to install.
export_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 export_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 export_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.
export_diagram is provided by the Excalidraw MCP Server MCP server (scofieldfree/excalidraw-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Excalidraw MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
11 Excalidraw MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.