xflows_build_transaction

WHAT IT DOES

What xflows_build_transaction does on VeChain AI Terminal MCP Server

AI agents invoke xflows_build_transaction to trigger actions in VeChain AI Terminal 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 xflows_build_transaction needs a policy

xflows_build_transaction triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xflows_build_transaction Rate-limited

xflows_build_transaction 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": {
    "xflows_build_transaction": {
      "limits": [
        {
          "counter": "xflows_build_transaction_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 VeChain AI Terminal MCP Server, so you can run agents against it safely.

FAQ

Questions about xflows_build_transaction

What does the xflows_build_transaction tool do? +

Build cross-chain swap transaction using XFlows (section 5). It is categorised as a Execute tool in the VeChain AI Terminal 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 xflows_build_transaction? +

Register the VeChain AI Terminal MCP Server MCP server in PolicyLayer and add a rule for xflows_build_transaction: 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 VeChain AI Terminal MCP Server. Nothing to install.

What risk level is xflows_build_transaction? +

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

Can I rate-limit xflows_build_transaction? +

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

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

xflows_build_transaction is provided by the VeChain AI Terminal MCP Server MCP server (vechain-ai-terminal/vechain-terminal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.