Get paginated cardholder declines. Optionally filter by cardholder account ID.
AI agents call pex_get_cardholder_declines to retrieve information from PEX MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical decline records for cardholders, which is a read-only query operation with no side effects. The data returned is informational about past declined transactions. While it accesses financial account information, the actual financial operations (charges, transfers, etc.) are not performed by this tool—only historical decline events are retrieved.
From the tool's definition Tool name contains 'get' and description states 'Get paginated cardholder declines' with optional filtering. No modification, deletion, or execution capability mentioned.
Attacks that exploit this kind of access
Get paginated cardholder declines. Optionally filter by cardholder account ID. It is categorised as a Read tool in the PEX MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PEX MCP Server MCP server in PolicyLayer and add a rule for pex_get_cardholder_declines: 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 PEX MCP Server. Nothing to install.
pex_get_cardholder_declines 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 pex_get_cardholder_declines 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 pex_get_cardholder_declines. 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.
pex_get_cardholder_declines is provided by the PEX MCP Server MCP server (pexcard/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.
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