create_feed

Submit a feed to SP-API (e.g. POST_PRODUCT_DATA, POST_INVENTORY_AVAILABILITY_DATA, JSON_LISTINGS_FEED). Feed contents must first be uploaded via the Feed Document API to get an inputFeedDocumentId.

ServerMcp Afip
CategoryWrite

How to control create_feed ↓

WHAT IT DOES

What create_feed does on Mcp Afip

AI agents use create_feed 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 RISK

Medium Risk

Why create_feed needs a policy

This tool creates or modifies data (product information, inventory levels, listings) in what appears to be a marketplace or e-commerce system. While the changes are reversible through subsequent updates or deletions, the tool itself performs creation/modification operations rather than retrieval (Read), code execution (Execute), or deletion (Destructive).

From the tool's definition The tool 'create_feed' submits feeds to SP-API with types like 'POST_PRODUCT_DATA', 'POST_INVENTORY_AVAILABILITY_DATA', and 'JSON_LISTINGS_FEED', which create or modify product data, inventory, and listings in a system.

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

POLICY

How to control create_feed

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 create_feed:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_feed": {
      "limits": [
        {
          "counter": "create_feed_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create_feed 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.

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.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about create_feed

What does the create_feed tool do? +

Submit a feed to SP-API (e.g. POST_PRODUCT_DATA, POST_INVENTORY_AVAILABILITY_DATA, JSON_LISTINGS_FEED). Feed contents must first be uploaded via the Feed Document API to get an inputFeedDocumentId. 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.

How do I enforce a policy on create_feed? +

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

create_feed is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_feed? +

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

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

create_feed 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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