Close a position and immediately open the opposite side with same volume. Two-step composite — if the re-open fails (207), the position is already closed. Costs 2 weight.
AI agents call reverse_position to retrieve information from XBTFX MCP Trading Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though reverse_position only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
Close a position and immediately open the opposite side with same volume. Two-step composite — if the re-open fails (207), the position is already closed. Costs 2 weight. It is categorised as a Read tool in the XBTFX MCP Trading Server MCP Server, which means it retrieves data without modifying state.
Register the XBTFX MCP Trading Server MCP server in PolicyLayer and add a rule for reverse_position: 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 XBTFX MCP Trading Server. Nothing to install.
reverse_position is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the reverse_position 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 reverse_position. 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.
reverse_position is provided by the XBTFX MCP Trading Server MCP server (xbtfx/xbtfx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
reverse_position is one line of XBTFX MCP Trading Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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