spline_export_json

THE RISK

Low Risk

Why spline_export_json needs a policy

This tool reads and exports spline point data in JSON format. It retrieves existing data without modifying, creating, or deleting anything. Export/read operations are low severity with minimal blast radius.

From the tool's definition Export spline point data as JSON

Documented attack patterns abuse exactly the kind of access spline_export_json gives an agent:

POLICY

How to control spline_export_json

PolicyLayer is an MCP gateway — it sits between your AI agents and Uefn, and nothing reaches the server without passing your rules. This is the rule we recommend for spline_export_json:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "spline_export_json": {}
  }
}

spline_export_json is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Uefn — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about spline_export_json

What does the spline_export_json tool do? +

Export spline point data as JSON. It is categorised as a Read tool in the Uefn MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on spline_export_json? +

Register the Uefn MCP server in PolicyLayer and add a rule for spline_export_json: 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 Uefn. Nothing to install.

What risk level is spline_export_json? +

spline_export_json is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit spline_export_json? +

Yes. Add a rate_limit block to the spline_export_json 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.

How do I block spline_export_json completely? +

Set action: deny in the PolicyLayer policy for spline_export_json. 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.

What MCP server provides spline_export_json? +

spline_export_json is provided by the Uefn MCP server (quangdang46/uefn-verse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Uefn tool call.

Start from Uefn, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →