# alex_execute_swap_2hop

Execute 2-hop token swap via swap-helper-a (token-x/token-y -> token-y/token-z)

Agent View of the PolicyLayer registry record for `alex_execute_swap_2hop`. HTML page: https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/alex-execute-swap-2hop

## Facts

- Tool: `alex_execute_swap_2hop`
- Server: Stacks AI MCP Server (`stack-ai-mcp/stacks-mcp-server`) — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server.md
- Homepage: https://github.com/Stack-AI-MCP/stacks-mcp-server
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Approval-gated

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "alex_execute_swap_2hop",
    "arguments": {}
  }
}
```

## Why alex_execute_swap_2hop is rated Critical

This tool executes a multi-hop token swap on a DeFi protocol, directly moving/trading financial assets on the Stacks blockchain. Swapping tokens constitutes a financial transaction that commits real value and cannot be trivially reversed, making it Financial category with critical severity due to potential for significant monetary loss if misused by an AI agent.

From the tool's own definition: "Execute 2-hop token swap via swap-helper-a (token-x/token-y -> token-y/token-z)"

## Use case

AI agents use alex_execute_swap_2hop to commit financial operations through Stacks AI MCP Server, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Stacks AI MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "alex_execute_swap_2hop": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on Stacks AI MCP Server (199)

- `arkadiko_burn_usda` — Destructive — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-burn-usda.md
- `bitflow_cancel_group_order` — Destructive — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-cancel-group-order.md
- `bitflow_cancel_keeper_order` — Destructive — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-cancel-keeper-order.md
- `charisma_cancel_order` — Destructive — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-cancel-order.md
- `charisma_revoke_api_key` — Destructive — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-revoke-api-key.md
- `alex_execute_swap_3hop` — Execute — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/alex-execute-swap-3hop.md
- `arkadiko_create_proposal` — Execute — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-create-proposal.md
- `broadcast_transaction` — Execute — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/broadcast-transaction.md
- `charisma_execute_intent` — Execute — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-execute-intent.md
- `charisma_execute_order` — Execute — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-execute-order.md
- `alex_execute_swap` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/alex-execute-swap.md
- `alex_execute_swap_4hop` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/alex-execute-swap-4hop.md
- `arkadiko_add_liquidity` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-add-liquidity.md
- `arkadiko_claim_staking_rewards` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-claim-staking-rewards.md
- `arkadiko_close_vault` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-close-vault.md
- `arkadiko_complete_cdp_workflow` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-complete-cdp-workflow.md
- `arkadiko_complete_governance_workflow` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-complete-governance-workflow.md
- `arkadiko_create_vault` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-create-vault.md
- `arkadiko_stake_diko` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-stake-diko.md
- `arkadiko_swap_tokens` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/arkadiko-swap-tokens.md
- `bitflow_create_group_order` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-create-group-order.md
- `bitflow_create_keeper_order` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-create-keeper-order.md
- `bitflow_execute_btc_to_sbtc_keeper_order` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-execute-btc-to-sbtc-keeper-order.md
- `bitflow_execute_token_swap_with_keeper` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-execute-token-swap-with-keeper.md
- `bitflow_setup_dca_orders` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/bitflow-setup-dca-orders.md
- `charisma_complete_swap_workflow` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-complete-swap-workflow.md
- `charisma_create_order` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-create-order.md
- `charisma_execute_multihop_swap` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/charisma-execute-multihop-swap.md
- `granite_add_collateral` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/granite-add-collateral.md
- `granite_borrow` — Financial — https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server/granite-borrow.md
- …and 169 more: https://policylayer.com/tools/stack-ai-mcp-stacks-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=stack-ai-mcp-stacks-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/stack-ai-mcp-stacks-mcp-server