vtex_create_specification_field · MCP VTEX Server MCP

WHAT IT DOES

What vtex_create_specification_field does on MCP VTEX Server

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

WHY IT NEEDS A POLICY

Why vtex_create_specification_field needs a policy

This tool creates new metadata/schema elements (specification fields) within the VTEX catalog system. While reversible (specification fields can typically be archived or deleted), it modifies the platform's data structure in a way that affects product catalog operations.

From the tool's definition Tool name contains 'create' and description states 'Create a new specification field for a category' — this operation adds a new data structure to the catalog that can be modified or extended later.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vtex_create_specification_field Rate-limited

vtex_create_specification_field 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": {
    "vtex_create_specification_field": {
      "limits": [
        {
          "counter": "vtex_create_specification_field_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about vtex_create_specification_field

What does the vtex_create_specification_field tool do? +

Create a new specification field for a category. It is categorised as a Write tool in the MCP VTEX 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 vtex_create_specification_field? +

Register the MCP VTEX Server MCP server in PolicyLayer and add a rule for vtex_create_specification_field: 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 VTEX Server. Nothing to install.

What risk level is vtex_create_specification_field? +

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

Can I rate-limit vtex_create_specification_field? +

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

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

vtex_create_specification_field is provided by the MCP VTEX Server MCP server (leosepulveda/mcp-vtex). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.