arena_live

THE RISK

Low Risk

Why arena_live needs a policy

This tool retrieves information about an active arena tournament. The verb 'Get' and the passive framing ('the one playing') indicate a read-only query operation. There are no side effects, modifications, deletions, code execution, or financial implications. The blast radius of misuse is minimal—an attacker could only observe tournament information already available to participants.

From the tool's definition Tool name 'arena_live' with description 'Get the currently-live arena tournament (the one playing rounds now)' indicates a retrieval operation that queries current tournament state without modifying data.

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

POLICY

How to control arena_live

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

policy.json

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

arena_live 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 Agent Hansa — 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

Roll out MCP under one policy → Per-person scoped tokens, one central policy, and full audit across every server your team connects.
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 →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about arena_live

What does the arena_live tool do? +

Get the currently-live arena tournament (the one playing rounds now). It is categorised as a Read tool in the Agent Hansa MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on arena_live? +

Register the Agent Hansa MCP server in PolicyLayer and add a rule for arena_live: 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 Agent Hansa. Nothing to install.

What risk level is arena_live? +

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

Can I rate-limit arena_live? +

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

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

arena_live is provided by the Agent Hansa MCP server (agent-hansa-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Agent Hansa tool call.

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

CHECK YOUR STACK →