update_autonumber_format

THE RISK

Medium Risk

Why update_autonumber_format needs a policy

This tool modifies the configuration/schema of an existing column in a reversible manner (the format can be changed again). It does not delete data or execute arbitrary code, so it is Write rather than Execute or Destructive.

From the tool's definition Updates the AutoNumberFormat of an existing AutoNumber column. This changes how future values will be generated but does not affect existing records.

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

POLICY

How to control update_autonumber_format

PolicyLayer is an MCP gateway — it sits between your AI agents and Dataverse MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for update_autonumber_format:

policy.json

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

update_autonumber_format 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 Dataverse MCP Server — 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 update_autonumber_format

What does the update_autonumber_format tool do? +

Updates the AutoNumberFormat of an existing AutoNumber column. This changes how future values will be generated but does not affect existing records. It is categorised as a Write tool in the Dataverse 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 update_autonumber_format? +

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

What risk level is update_autonumber_format? +

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

Can I rate-limit update_autonumber_format? +

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

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

update_autonumber_format is provided by the Dataverse MCP Server MCP server (mwhesse/dataverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Dataverse MCP Server tool call.

Start from Dataverse MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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