list_autonumber_columns

THE RISK

Low Risk

Why list_autonumber_columns needs a policy

This tool queries and retrieves metadata about AutoNumber column configurations in Dataverse tables. It performs no write, delete, execute, or financial operations. While it accesses enterprise schema information, the read-only nature and limited blast radius (information disclosure only) place it in the Read category with low severity.

From the tool's definition Tool description states 'Lists all AutoNumber columns' - a retrieval operation with no modification or side effects. The verb 'Lists' and the stated purpose of 'identify existing AutoNumber implementations' indicate read-only schema introspection.

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

POLICY

How to control list_autonumber_columns

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 list_autonumber_columns:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_autonumber_columns": {}
  }
}

list_autonumber_columns is read-only, so it stays allowed — but 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.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_autonumber_columns

What does the list_autonumber_columns tool do? +

Lists all AutoNumber columns in a specific table or across all tables in the environment. Helps identify existing AutoNumber implementations. It is categorised as a Read tool in the Dataverse MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_autonumber_columns? +

Register the Dataverse MCP Server MCP server in PolicyLayer and add a rule for list_autonumber_columns: 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 list_autonumber_columns? +

list_autonumber_columns is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_autonumber_columns? +

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

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

list_autonumber_columns 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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