aqs_signup · EPA Air Quality System (AQS) MCP Server MCP

WHAT IT DOES

What aqs_signup does on EPA Air Quality System (AQS) MCP Server

AI agents use aqs_signup to create or update resources in EPA Air Quality System (AQS) MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your EPA Air Quality System (AQS) MCP Server environment.

WHY IT NEEDS A POLICY

Why aqs_signup needs a policy

This tool creates a new account/API key registration with the EPA AQS system. It is a Write operation as it creates new data (an account or API key) in an external system. It is reversible in principle (accounts can be deleted).

From the tool's definition Register for an EPA Air Quality System (AQS) API key

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

aqs_signup Rate-limited

aqs_signup 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": {
    "aqs_signup": {
      "limits": [
        {
          "counter": "aqs_signup_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 EPA Air Quality System (AQS) MCP Server, so you can run agents against it safely.

FAQ

Questions about aqs_signup

What does the aqs_signup tool do? +

Register for an EPA Air Quality System (AQS) API key. It is categorised as a Write tool in the EPA Air Quality System (AQS) 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 aqs_signup? +

Register the EPA Air Quality System (AQS) MCP Server MCP server in PolicyLayer and add a rule for aqs_signup: 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 EPA Air Quality System (AQS) MCP Server. Nothing to install.

What risk level is aqs_signup? +

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

Can I rate-limit aqs_signup? +

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

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

aqs_signup is provided by the EPA Air Quality System (AQS) MCP Server MCP server (tyson-swetnam/aqs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.