Apply a workflow Decision to a specific order (POST /v3/accounts/{account_id}/users/{user_id}/orders/{order_id}/decisions). Order-level decisions target a single transaction rather than the whole user (e.g.
AI agents use apply_decision_to_order to create or update resources in Mcp Afip — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Afip environment.
The POST method and action of 'apply_decision_to_order' indicate data modification rather than retrieval (Read) or deletion (Destructive). While it affects financial orders in an AFIP invoicing context, it does not itself move money or create financial obligations—it applies workflow decisions (likely approval/rejection/status changes) to orders, which is a reversible Write operation.
From the tool's definition Tool applies a workflow decision to a specific order via POST request, modifying order state/status. Description indicates it targets 'a single transaction' and references 'Order-level decisions', suggesting reversible state changes to order data.
Documented attack patterns abuse exactly the kind of access apply_decision_to_order gives an agent:
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 apply_decision_to_order:
{
"version": "1",
"default": "deny",
"tools": {
"apply_decision_to_order": {
"limits": [
{
"counter": "apply_decision_to_order_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}apply_decision_to_order 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.
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Apply a workflow Decision to a specific order (POST /v3/accounts/{account_id}/users/{user_id}/orders/{order_id}/decisions). Order-level decisions target a single transaction rather than the whole user (e.g. It is categorised as a Write tool in the Mcp Afip MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Afip MCP server in PolicyLayer and add a rule for apply_decision_to_order: 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.
apply_decision_to_order is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the apply_decision_to_order 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.
Set action: deny in the PolicyLayer policy for apply_decision_to_order. 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.
apply_decision_to_order 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.
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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