Verify that the off-chain fee quote matches what the on-chain DPXSettlementRouter contract will charge. Returns feesMatch (true/false). If feesMatch is true, proceed with settlement. Call this after get_quote and before settle.
AI agents call verify_fees to retrieve information from Dpx without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Although this tool operates in a financial settlement context, it is purely informational—it queries and compares fee data without moving money, committing obligations, or triggering settlement. The tool does not execute the settlement itself (that is settle's responsibility).
From the tool's definition verify_fees returns a comparison result (feesMatch true/false) with no side effects. The description states 'Returns feesMatch' and instructs to 'Call this after get_quote and before settle', indicating it performs a lookup/verification check against on-chain…
Attacks that exploit this kind of access
Verify that the off-chain fee quote matches what the on-chain DPXSettlementRouter contract will charge. Returns feesMatch (true/false). If feesMatch is true, proceed with settlement. Call this after get_quote and before settle. It is categorised as a Read tool in the Dpx MCP Server, which means it retrieves data without modifying state.
Register the Dpx MCP server in PolicyLayer and add a rule for verify_fees: 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 Dpx. Nothing to install.
verify_fees 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 verify_fees 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 verify_fees. 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.
verify_fees is provided by the Dpx MCP server (untitledfinancial/dpx-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.
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