sub · Test MCP Server MCP: Risk & Policy

WHAT IT DOES

What sub does on Test MCP Server

AI agents use sub to create or update resources in Test MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Test MCP Server environment.

WHY IT NEEDS A POLICY

Why sub needs a policy

An AI agent can call sub faster than any human can review — one bad instruction and it creates or modifies resources in Test MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sub Rate-limited

sub 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sub": {
      "limits": [
        {
          "counter": "sub_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Test MCP Server, so you can run agents against it safely.

FAQ

Questions about sub

What does the sub tool do? +

sub. It is categorised as a Write tool in the Test MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sub? +

Register the Test MCP Server MCP server in PolicyLayer and add a rule for sub: 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 Test MCP Server. Nothing to install.

What risk level is sub? +

sub is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit sub? +

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

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

sub is provided by the Test MCP Server MCP server (omkar4141/test_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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