createCustomer | PolicyLayer

WHAT IT DOES

What createCustomer does on Dynamics 365 Finance & Operations MCP Server

AI agents use createCustomer to create or update resources in Dynamics 365 Finance & Operations MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Dynamics 365 Finance & Operations MCP Server environment.

WHY IT NEEDS A POLICY

Why createCustomer needs a policy

This tool creates new customer records in a Dynamics 365 Finance & Operations system, which is a reversible data modification operation. It falls under the Write category (not Destructive, as customer records can be deleted or modified later).

From the tool's definition Tool name 'createCustomer' and description 'Creates a new customer record in CustomersV3' explicitly indicate creation of new data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createCustomer Rate-limited

createCustomer 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": {
    "createCustomer": {
      "limits": [
        {
          "counter": "createcustomer_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 Dynamics 365 Finance & Operations MCP Server, so you can run agents against it safely.

FAQ

Questions about createCustomer

What does the createCustomer tool do? +

Creates a new customer record in CustomersV3. It is categorised as a Write tool in the Dynamics 365 Finance & Operations 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 createCustomer? +

Register the Dynamics 365 Finance & Operations MCP Server MCP server in PolicyLayer and add a rule for createCustomer: 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 Dynamics 365 Finance & Operations MCP Server. Nothing to install.

What risk level is createCustomer? +

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

Can I rate-limit createCustomer? +

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

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

createCustomer is provided by the Dynamics 365 Finance & Operations MCP Server MCP server (sahib-sawhney-wh/fno-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.