get_bounces

Retrieve bounced recipients via GET /suppression/bounces. Returns [{email, created, reason, status}]. Filter by time window with start_time/end_time (Unix seconds).

ServerMcp Afip
CategoryRead

How to control get_bounces ↓

WHAT IT DOES

What get_bounces does on Mcp Afip

AI agents call get_bounces to retrieve information from Mcp Afip without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why get_bounces needs a policy

This tool retrieves suppression list data (bounced email addresses) without creating, modifying, deleting, or executing actions. It is a read-only query operation with minimal blast radius—at worst, an AI could retrieve a list of invalid email addresses, which is already public suppression data. No financial, destructive, or execution capabilities are present.

From the tool's definition Tool description states 'Retrieve bounced recipients' and uses GET method with filtering parameters (start_time/end_time). Returns structured data [{email, created, reason, status}] with no modification capabilities mentioned.

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

POLICY

How to control get_bounces

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

policy.json

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

get_bounces 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 Mcp Afip — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

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.
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Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_bounces

What does the get_bounces tool do? +

Retrieve bounced recipients via GET /suppression/bounces. Returns [{email, created, reason, status}]. Filter by time window with start_time/end_time (Unix seconds). It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_bounces? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for get_bounces: 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 Mcp Afip. Nothing to install.

What risk level is get_bounces? +

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

Can I rate-limit get_bounces? +

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

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

get_bounces is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Afip tool call.

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

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