isw_validate_card

Validate card CVV and expiry. Requires confirm: true.

SERVERInterswitch SOURCEinterswitch-mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-dairus01-interswitch-mcp-server/isw-validate-card.md

WHAT IT DOES

What isw_validate_card does on Interswitch

AI agents call isw_validate_card 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.

RISK

Why isw_validate_card is rated Low

The tool validates card credentials (CVV and expiry), which is a read/verification operation — it checks whether the provided values are correct without modifying data. However, it handles highly sensitive payment card data (CVV, expiry), giving it high severity since misuse could facilitate card fraud or unauthorized access.

From the tool's definition Validate card CVV and expiry

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs isw_validate_card 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_validate_card, this is the rule to start with:

isw_validate_card Allowed

isw_validate_card is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "isw_validate_card": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Interswitch, apply this rule, and every isw_validate_card call is checked against it from then on.

FAQ

Questions about isw_validate_card

What does the isw_validate_card tool do? +

Validate card CVV and expiry. Requires confirm: true. It is categorised as a Read tool in the Interswitch MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on isw_validate_card? +

Register the Interswitch MCP server in PolicyLayer and add a rule for isw_validate_card: 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.

What risk level is isw_validate_card? +

isw_validate_card is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit isw_validate_card? +

Yes. Add a rate_limit block to the isw_validate_card 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.

How do I block isw_validate_card completely? +

Set action: deny in the PolicyLayer policy for isw_validate_card. 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.

What MCP server provides isw_validate_card? +

isw_validate_card 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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