alex_execute_swap_3hop · Stacks AI MCP Server MCP

WHAT IT DOES

What alex_execute_swap_3hop does on Stacks AI MCP Server

AI agents invoke alex_execute_swap_3hop to trigger actions in Stacks AI MCP Server. 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 alex_execute_swap_3hop needs a policy

This tool executes a complex blockchain transaction (a 3-hop swap) that triggers external operations on the Stacks DeFi ecosystem. While it is not strictly destructive (the user retains the output tokens), it is Execute-category because: (1) it runs an external operation whose effects depend on provided arguments (token pairs, amounts); (2) it commits financial assets to a transaction path; (3) misuse could result…

From the tool's definition Execute 3-hop token swap via swap-helper-b (X->Y->Z->W) - the tool executes a multi-step swap transaction that irreversibly moves tokens across three trading pairs, with outcomes dependent on market conditions and arguments provided.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

alex_execute_swap_3hop Rate-limited

alex_execute_swap_3hop 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": {
    "alex_execute_swap_3hop": {
      "limits": [
        {
          "counter": "alex_execute_swap_3hop_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 Stacks AI MCP Server, so you can run agents against it safely.

FAQ

Questions about alex_execute_swap_3hop

What does the alex_execute_swap_3hop tool do? +

Execute 3-hop token swap via swap-helper-b (X->Y->Z->W). It is categorised as a Execute tool in the Stacks AI MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on alex_execute_swap_3hop? +

Register the Stacks AI MCP Server MCP server in PolicyLayer and add a rule for alex_execute_swap_3hop: 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 Stacks AI MCP Server. Nothing to install.

What risk level is alex_execute_swap_3hop? +

alex_execute_swap_3hop is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit alex_execute_swap_3hop? +

Yes. Add a rate_limit block to the alex_execute_swap_3hop 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 alex_execute_swap_3hop completely? +

Set action: deny in the PolicyLayer policy for alex_execute_swap_3hop. 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 alex_execute_swap_3hop? +

alex_execute_swap_3hop is provided by the Stacks AI MCP Server MCP server (stack-ai-mcp/stacks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.