isw_change_card_pin

Change a Card 360 card PIN. Plaintext PINs are encrypted locally and never sent. Requires confirm: true.

SERVERInterswitch SOURCEinterswitch-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What isw_change_card_pin does on Interswitch

AI agents use isw_change_card_pin to create or update resources in Interswitch, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Interswitch environment.

RISK

Why isw_change_card_pin is rated Medium

This tool modifies card PIN data, which is a write operation. While it does not delete data or move money directly, changing a PIN is a sensitive security-related modification that could compromise card access control if misused by an agent. The requirement for 'confirm: true' and local encryption provide some safeguards.

From the tool's definition Tool name 'isw_change_card_pin' and description 'Change a Card 360 card PIN' indicates modification of card security credentials. This is a reversible write operation that alters card PIN data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs isw_change_card_pin 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_change_card_pin, this is the rule to start with:

isw_change_card_pin Rate-limited

isw_change_card_pin stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "isw_change_card_pin": {
      "limits": [
        {
          "counter": "isw_change_card_pin_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about isw_change_card_pin

What does the isw_change_card_pin tool do? +

Change a Card 360 card PIN. Plaintext PINs are encrypted locally and never sent. Requires confirm: true. It is categorised as a Write tool in the Interswitch MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on isw_change_card_pin? +

Register the Interswitch MCP server in PolicyLayer and add a rule for isw_change_card_pin: 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_change_card_pin? +

isw_change_card_pin is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit isw_change_card_pin? +

Yes. Add a rate_limit block to the isw_change_card_pin 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_change_card_pin completely? +

Set action: deny in the PolicyLayer policy for isw_change_card_pin. 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_change_card_pin? +

isw_change_card_pin 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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