Low Risk

echo_violations

Get violation details for a facility, filterable by program (water, air, waste). Returns violation dates, types, and current status.

Part of the Epa Echo server.

echo_violations is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call echo_violations to retrieve information from Epa Echo without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though echo_violations only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "echo_violations": {}
  }
}

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These attack patterns abuse exactly the kind of access echo_violations gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so echo_violations only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the echo_violations tool do? +

Get violation details for a facility, filterable by program (water, air, waste). Returns violation dates, types, and current status.. It is categorised as a Read tool in the Epa Echo MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on echo_violations? +

Register the Epa Echo MCP server in PolicyLayer and add a rule for echo_violations: 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 Echo. Nothing to install.

What risk level is echo_violations? +

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

Can I rate-limit echo_violations? +

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

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

echo_violations is provided by the Epa Echo MCP server (https://gateway.pipeworx.io/epa-echo/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Epa Echo tool call.

Deterministic rules across all 25 Epa Echo tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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