pattern_circle

THE RISK

Low Risk

Why pattern_circle needs a policy

The name 'pattern_circle' suggests it may arrange actors in a circular pattern in the UEFN editor, which would be a Write operation. However, with an empty description, it's impossible to determine the actual behavior with confidence. Based on context of sibling tools (actor placement, movement, etc.), it likely places or arranges objects in a pattern, but this is speculative.

From the tool's definition Tool name is 'pattern_circle' with empty description. No information available about what the tool does beyond its name.

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

POLICY

How to control pattern_circle

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 pattern_circle:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pattern_circle": {
      "limits": [
        {
          "counter": "pattern_circle_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

pattern_circle gets a rate cap, and 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.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Uefn tools

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All 143 Uefn tools →

Other tools on other servers

Android Forensics ADB MCP Server generate_app_analysis_report Ethereum Tools add Math MCP Server complex_analysis_suite Crypto_MCP aes_encrypt

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about pattern_circle

What does the pattern_circle tool do? +

pattern_circle. It is categorised as a Other tool in the Uefn MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on pattern_circle? +

Register the Uefn MCP server in PolicyLayer and add a rule for pattern_circle: 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 pattern_circle? +

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

Can I rate-limit pattern_circle? +

Yes. Add a rate_limit block to the pattern_circle 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 pattern_circle completely? +

Set action: deny in the PolicyLayer policy for pattern_circle. 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 pattern_circle? +

pattern_circle 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 →