simrelay_login · SimRelay MCP Server MCP: Risk & Policy

WHAT IT DOES

What simrelay_login does on SimRelay MCP Server

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

WHY IT NEEDS A POLICY

Why simrelay_login needs a policy

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

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

simrelay_login Rate-limited

simrelay_login 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": {
    "simrelay_login": {
      "limits": [
        {
          "counter": "simrelay_login_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 SimRelay MCP Server, so you can run agents against it safely.

FAQ

Questions about simrelay_login

What does the simrelay_login tool do? +

Sign in to SimRelay via OAuth. Opens the user. It is categorised as a Write tool in the SimRelay 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 simrelay_login? +

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

What risk level is simrelay_login? +

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

Can I rate-limit simrelay_login? +

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

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

simrelay_login is provided by the SimRelay MCP Server MCP server (simrelay/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.