alpha_cancel_order

THE RISK

Critical Risk

Why alpha_cancel_order needs a policy

This tool cancels a financial order on a trading platform and triggers refunds of USDC, tokens, and ALGO collateral. It directly affects financial positions and asset flows on the Algorand blockchain, making it a Financial category action. Misuse could cancel legitimate open orders and disrupt trading positions, warranting high severity.

From the tool's definition Cancel an open Alpha Arcade order. Requires escrowAppId and orderOwner. Refunds USDC/tokens and ~0.957 ALGO collateral.

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

POLICY

How to control alpha_cancel_order

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "alpha_cancel_order": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to alpha_cancel_order is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register Algorand MCP — 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

Related tools and policies

More Algorand MCP tools

Financial alpha_amend_order Edit an existing unfilled Alpha Arcade order in-place (change price, quantity, or slippage Financial api_ultrade_market_cancel_orders Cancel multiple open orders Financial api_haystack_execute_swap Execute an optimized token swap via Haystack Router — gets the best route across multiple Financial api_ultrade_wallet_withdraw Withdraw token Financial api_ultrade_wallet_withdraw_message Generate message from the withdrawal data Financial make_asset_transfer_txn Create an asset transfer transaction Financial alpha_claim Claim USDC from a resolved Alpha Arcade market by redeeming outcome tokens. Winning = 1:1 Financial alpha_propose_match Propose a match between an existing maker order and your wallet as taker on Alpha Arcade.

All 172 Algorand MCP tools →

Financial tools on other servers

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Go deeper

Govern MCP payment tools → Approval gates, spend caps, and per-identity scopes on every refund, payout, and charge your agents make.
Critical-risk tools in Algorand MCP → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about alpha_cancel_order

What does the alpha_cancel_order tool do? +

Cancel an open Alpha Arcade order. Requires escrowAppId and orderOwner. Refunds USDC/tokens and ~0.957 ALGO collateral. It is categorised as a Financial tool in the Algorand MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on alpha_cancel_order? +

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

What risk level is alpha_cancel_order? +

alpha_cancel_order is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit alpha_cancel_order? +

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

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

alpha_cancel_order is provided by the Algorand MCP server (goplausible/algorand-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Algorand MCP tool call.

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

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