Get remaining spending limits for a specific cardholder
AI agents call pex_get_account_remaining_limits 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 financial data (remaining spending limits) but does not execute transactions, modify accounts, delete data, or commit financial obligations. It is purely informational and read-only. The low severity reflects that viewing spending limits carries minimal risk—the information is already known to authorized account users and cannot cause direct financial harm through retrieval alone.
From the tool's definition Tool name is 'pex_get_account_remaining_limits' with description 'Get remaining spending limits for a specific cardholder'.
Attacks that exploit this kind of access
Get remaining spending limits for a specific cardholder. 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_account_remaining_limits: 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_account_remaining_limits 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_account_remaining_limits 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_account_remaining_limits. 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_account_remaining_limits 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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