create_query · Dune MCP: Risk & Policy

WHAT IT DOES

What create_query does on Dune

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

WHY IT NEEDS A POLICY

Why create_query needs a policy

This tool creates and stores a new query resource in Dune Analytics. While it persists data, it is reversible (queries can be modified or archived as evidenced by the sibling 'archive_query' tool). It does not execute code, delete data, or involve financial transactions. Therefore it falls into the Write category.

From the tool's definition Tool description states 'Save a new query to Dune' which is a create operation that generates a new persistent resource (Query ID). The action is reversible (queries can be deleted/archived) and does not delete, move money, or execute arbitrary code.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_query Rate-limited

create_query 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": {
    "create_query": {
      "limits": [
        {
          "counter": "create_query_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 Dune, so you can run agents against it safely.

FAQ

Questions about create_query

What does the create_query tool do? +

Save a new query to Dune. Returns Query ID. (Requires Paid Plan). It is categorised as a Write tool in the Dune MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_query? +

Register the Dune MCP server in PolicyLayer and add a rule for create_query: 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 Dune. Nothing to install.

What risk level is create_query? +

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

Can I rate-limit create_query? +

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

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

create_query is provided by the Dune MCP server (nice-bills/dune-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.