cancel_execution · Dune MCP: Risk & Policy

WHAT IT DOES

What cancel_execution does on Dune

AI agents invoke cancel_execution to trigger actions in Dune. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why cancel_execution needs a policy

Cancelling an execution is an action that terminates an in-progress operation. It is not purely read-only, nor does it delete data, but it does affect an external running process. This is an Execute-category action with medium severity since it can interrupt legitimate queries but does not destroy data or have financial implications.

From the tool's definition Cancel an ongoing query execution

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cancel_execution Rate-limited

cancel_execution stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cancel_execution": {
      "limits": [
        {
          "counter": "cancel_execution_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 cancel_execution

What does the cancel_execution tool do? +

Cancel an ongoing query execution. It is categorised as a Execute tool in the Dune MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cancel_execution? +

Register the Dune MCP server in PolicyLayer and add a rule for cancel_execution: 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 cancel_execution? +

cancel_execution is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit cancel_execution? +

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

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

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