refresh_access_token

Mint a fresh short-lived access-token from the partner api-secret. Some Partner API tiers require this token (sent as the access-token header) on order/user endpoints. The token is short-lived (~minutes); cache it and refresh on 401. Returns { accessToken, expiresAt }.

ServerMcp Afip
CategoryOther

How to control refresh_access_token ↓

WHAT IT DOES

What refresh_access_token does on Mcp Afip

AI agents call refresh_access_token as a supporting operation in Mcp Afip workflows.

THE RISK

Low Risk

Why refresh_access_token needs a policy

This tool generates an authentication token from an existing secret credential. It does not read business data, write records, execute commands, destroy data, or move money. It is purely an auth/session management operation. The closest category is Other, since it is a credential/token issuance action rather than a data operation. Severity is low in isolation, though misuse could enable further unauthorized access.

From the tool's definition Mint a fresh short-lived access-token from the partner api-secret... Returns { accessToken, expiresAt }

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

POLICY

How to control refresh_access_token

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 refresh_access_token:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "refresh_access_token": {
      "limits": [
        {
          "counter": "refresh_access_token_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

refresh_access_token gets a rate cap, and 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.

SET A RULE FOR THIS TOOL →

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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.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about refresh_access_token

What does the refresh_access_token tool do? +

How do I enforce a policy on refresh_access_token? +

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

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

Can I rate-limit refresh_access_token? +

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

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

refresh_access_token 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.

CHECK YOUR STACK →

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1300 Mcp Afip tools catalogued and risk-classified — across an index of 43,000+ MCP servers.