decode_isin

Decode ISIN (International Securities Identification Number) with Luhn check.

SERVERMcp India Stack SOURCErehan1020/mcp-india-stack

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade C, identity unverified Pull the record →

This record as markdown: /tools/rehan1020-mcp-india-stack/decode-isin.md

WHAT IT DOES

What decode_isin does on Mcp India Stack

AI agents call decode_isin to retrieve information from Mcp India Stack without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why decode_isin is rated Low

Decoding an ISIN is a read-only operation that parses and validates a standardized financial identifier. It performs no side effects, does not retrieve sensitive personal data, does not execute code, and does not modify any state. The Luhn check is a standard checksum validation algorithm. This is a low-severity tool suitable for legitimate financial information lookup.

From the tool's definition Tool name 'decode_isin' and description 'Decode ISIN (International Securities Identification Number) with Luhn check' indicate a validation/parsing operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs decode_isin safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp India Stack, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For decode_isin, this is the rule to start with:

decode_isin Allowed

decode_isin 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": {
    "decode_isin": {}
  }
}

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

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

FAQ

Questions about decode_isin

What does the decode_isin tool do? +

Decode ISIN (International Securities Identification Number) with Luhn check. It is categorised as a Read tool in the Mcp India Stack MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on decode_isin? +

Register the Mcp India Stack MCP server in PolicyLayer and add a rule for decode_isin: 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 Mcp India Stack. Nothing to install.

What risk level is decode_isin? +

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

Can I rate-limit decode_isin? +

Yes. Add a rate_limit block to the decode_isin 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 decode_isin completely? +

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

decode_isin is provided by the Mcp India Stack MCP server (rehan1020/mcp-india-stack). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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