tiendanube_update_product_variant_custom_field_values

WHAT IT DOES

What tiendanube_update_product_variant_custom_field_values does on Tienda Nube MCP Server

AI agents use tiendanube_update_product_variant_custom_field_values to create or update resources in Tienda Nube MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Tienda Nube MCP Server environment.

WHY IT NEEDS A POLICY

Why tiendanube_update_product_variant_custom_field_values needs a policy

This tool modifies product variant metadata (custom field values) but does not delete data irreversibly, execute arbitrary operations, or affect financial transactions. It is a standard data modification operation (Write category). Severity is medium because incorrect custom field associations could affect product visibility or filtering, but changes are reversible and the blast radius is limited to variant metadata.

From the tool's definition The tool name contains 'update' and the description states it can 'associate or disassociate custom field values with a specific product variant', which modifies product data in a reversible manner.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tiendanube_update_product_variant_custom_field_values Rate-limited

tiendanube_update_product_variant_custom_field_values 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Tienda Nube MCP Server, so you can run agents against it safely.

FAQ

Questions about tiendanube_update_product_variant_custom_field_values

What does the tiendanube_update_product_variant_custom_field_values tool do? +

Associate or disassociate custom field values with a specific product variant. It is categorised as a Write tool in the Tienda Nube MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tiendanube_update_product_variant_custom_field_values? +

Register the Tienda Nube MCP Server MCP server in PolicyLayer and add a rule for tiendanube_update_product_variant_custom_field_values: 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 Tienda Nube MCP Server. Nothing to install.

What risk level is tiendanube_update_product_variant_custom_field_values? +

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

Can I rate-limit tiendanube_update_product_variant_custom_field_values? +

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

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

tiendanube_update_product_variant_custom_field_values is provided by the Tienda Nube MCP Server MCP server (pedrohsguimaraes/nuvem-shop-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.