retrieve_liveness_result

Retrieve the liveness capability result — passive/active liveness decision plus per-frame anti-spoofing scores. Requires a workflow that included a liveness capability (selfie or video).

ServerMcp Afip
CategoryRead

How to control retrieve_liveness_result ↓

WHAT IT DOES

What retrieve_liveness_result does on Mcp Afip

AI agents call retrieve_liveness_result 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 retrieve_liveness_result needs a policy

This tool retrieves and queries previously-computed biometric verification results (liveness scores) from a workflow. It has no side effects — it does not create, modify, delete, or execute operations. The data returned is read-only output from an existing liveness check.

From the tool's definition Tool performs retrieval of existing liveness result data ('Retrieve the liveness capability result'). Uses verbs like 'Retrieve' and 'per-frame anti-spoofing scores' indicating data query/retrieval with no modification.

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

POLICY

How to control retrieve_liveness_result

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 retrieve_liveness_result:

policy.json

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

retrieve_liveness_result is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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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 →
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FAQ

Questions about retrieve_liveness_result

What does the retrieve_liveness_result tool do? +

Retrieve the liveness capability result — passive/active liveness decision plus per-frame anti-spoofing scores. Requires a workflow that included a liveness capability (selfie or video). 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 retrieve_liveness_result? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for retrieve_liveness_result: 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 retrieve_liveness_result? +

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

Can I rate-limit retrieve_liveness_result? +

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

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

retrieve_liveness_result 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.

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