Claim all vested funds from a streaming payment (callable by the recipient).
AI agents use withdraw_stream to commit financial operations through Remit Md MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool directly transfers financial value (vested funds) to the recipient, which constitutes a financial transaction. Even though it only withdraws already-vested amounts (a constraint that reduces severity slightly compared to unrestricted fund movement), the action commits financial obligations and moves money.
From the tool's definition Tool is named 'withdraw_stream' and described as enabling claiming of 'vested funds from a streaming payment.' The server description explicitly states it 'Enables AI agents to perform financial transactions such as direct payments, escrows, and bounty…
Attacks that exploit this kind of access
Claim all vested funds from a streaming payment (callable by the recipient). It is categorised as a Financial tool in the Remit Md MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Remit Md MCP Server MCP server in PolicyLayer and add a rule for withdraw_stream: 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 Remit Md MCP Server. Nothing to install.
withdraw_stream is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the withdraw_stream 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.
Set action: deny in the PolicyLayer policy for withdraw_stream. 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.
withdraw_stream is provided by the Remit Md MCP Server MCP server (pay-skill/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →