AI agents use kya_reportPurchase to commit financial operations through Payclaw — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool is intrinsically linked to financial operations: it records the outcome of purchase attempts made with a virtual Visa card. While it may appear to be a reporting/write action, it is a mandatory step in the financial transaction lifecycle ('Must be called after every purchase attempt'), making it a Financial category tool.
From the tool's definition 'Report the outcome of a purchase after using a kyaLabs virtual card' and 'closes the audit trail' — directly tied to financial transactions on Visa rails
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Report the outcome of a purchase after using a kyaLabs virtual card. Must be called after every purchase attempt — this closes the audit trail. It is categorised as a Financial tool in the Payclaw MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Payclaw MCP server in PolicyLayer and add a rule for kya_reportPurchase: 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 Payclaw. Nothing to install.
kya_reportPurchase 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 kya_reportPurchase 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 kya_reportPurchase. 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.
kya_reportPurchase is provided by the Payclaw MCP server (kyalabs-io/mcp-server). 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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