isw_fetch_customer_card_details
Fetch customer card details by account.
This record as markdown: /tools/io-github-dairus01-interswitch-mcp-server/isw-fetch-customer-card-details.md
What isw_fetch_customer_card_details does on Interswitch
AI agents call isw_fetch_customer_card_details to retrieve information from Interswitch without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why isw_fetch_customer_card_details is rated Low
This tool retrieves card information tied to a customer account. While it is a Read operation (no data is modified), the severity is elevated to medium because card details are sensitive financial information that could be misused if exposed to an unauthorized agent—an attacker could enumerate or harvest card metadata. However, the tool itself does not move money, execute commands, or delete data.
From the tool's definition Tool name contains 'fetch' and description states 'Fetch customer card details by account' — a retrieval operation with no modification.
Attacks that exploit this kind of access
The rule that runs isw_fetch_customer_card_details safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Interswitch, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For isw_fetch_customer_card_details, this is the rule to start with:
isw_fetch_customer_card_details is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Interswitch, apply this rule, and every isw_fetch_customer_card_details call is checked against it from then on.
Questions about isw_fetch_customer_card_details
Fetch customer card details by account. It is categorised as a Read tool in the Interswitch MCP Server, which means it retrieves data without modifying state.
Register the Interswitch MCP server in PolicyLayer and add a rule for isw_fetch_customer_card_details: 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 Interswitch. Nothing to install.
isw_fetch_customer_card_details 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 isw_fetch_customer_card_details 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 isw_fetch_customer_card_details. 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.
isw_fetch_customer_card_details is provided by the Interswitch MCP server (interswitch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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