Transfer a SIP-10 fungible token. Calls the token contract
AI agents use stx_transfer_sip10_ft to commit financial operations through Bitcoin wallet MCP server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool directly transfers cryptocurrency or tokenized financial value on the Stacks blockchain. Even if the transfer amount is small or can theoretically be reversed via a subsequent transfer, the primary function is to commit financial obligations and move assets. An AI agent misusing this tool could drain wallet balances or transfer user funds to adversaries.
From the tool's definition Tool name 'stx_transfer_sip10_ft' and description 'Transfer a SIP-10 fungible token' indicate irreversible movement of cryptocurrency assets (fungible tokens on the Stacks blockchain). SIP-10 is the Stacks standard for fungible tokens, analogous to ERC-20.
Attacks that exploit this kind of access
Transfer a SIP-10 fungible token. Calls the token contract. It is categorised as a Financial tool in the Bitcoin wallet MCP server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Bitcoin wallet MCP server MCP server in PolicyLayer and add a rule for stx_transfer_sip10_ft: 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 Bitcoin wallet MCP server. Nothing to install.
stx_transfer_sip10_ft 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 stx_transfer_sip10_ft 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 stx_transfer_sip10_ft. 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.
stx_transfer_sip10_ft is provided by the Bitcoin wallet MCP server MCP server (markmhendrickson/mcp-server-bitcoin). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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