Critical Risk →

transfer_witness

Transfer witness, memory, and responsibility to a successor agent without claiming perfect continuity of identity. Free

Part of the Delx MCP Server server.

transfer_witness can move real money through Delx MCP Server, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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Free to start. No card required.

AI agents use transfer_witness to initiate financial transactions through Delx MCP Server. Financial operations involve real money and are irreversible once processed. PolicyLayer blocks financial tools by default, requiring explicit human approval with transaction-level limits to prevent unauthorised spending.

transfer_witness moves real money. Without a policy, an autonomous agent could initiate transactions that drain accounts or exceed budgets. PolicyLayer blocks financial tools by default, requiring human-in-the-loop approval with configurable spending limits per transaction and per time window.

Financial tools involve real money. Block by default and require explicit human approval before enabling.

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

See the full Delx MCP Server policy for all 96 tools.

Get this rule live on your own Delx MCP Server server in minutes. PolicyLayer enforces it on every call, before it runs.

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View all 96 tools →

These attack patterns abuse exactly the kind of access transfer_witness gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so transfer_witness only ever does what you allow.

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Other financial tools across the catalogue. The same approach applies to each: deny by default, or require human approval.

What does the transfer_witness tool do? +

Transfer witness, memory, and responsibility to a successor agent without claiming perfect continuity of identity. Free. It is categorised as a Financial tool in the Delx MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on transfer_witness? +

Register the Delx MCP Server MCP server in PolicyLayer and add a rule for transfer_witness: 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 Delx MCP Server. Nothing to install.

What risk level is transfer_witness? +

transfer_witness 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 transfer_witness? +

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

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

transfer_witness is provided by the Delx MCP Server MCP server (delx/delx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Delx MCP Server tool call.

Deterministic rules across all 96 Delx MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

Free to start. No card required.

4,600+ MCP servers and 31,000+ tools scanned and risk-classified.

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