make_app_optin_txn

Create an application opt-in transaction

SERVERAlgorand MCP SOURCEgoplausible/algorand-mcp

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/goplausible-algorand-mcp/make-app-optin-txn.md

WHAT IT DOES

What make_app_optin_txn does on Algorand MCP

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

RISK

Why make_app_optin_txn is rated Medium

An opt-in transaction is a Write operation—it records the account's participation in an application contract on-chain. While reversible (accounts can opt-out), it commits data to the blockchain and represents a state modification rather than mere querying.

From the tool's definition Tool creates a transaction ('Create an application opt-in transaction'), which modifies blockchain state by registering an account's opt-in to an application, a reversible operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs make_app_optin_txn safely

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

make_app_optin_txn Rate-limited

make_app_optin_txn 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": {
    "make_app_optin_txn": {
      "limits": [
        {
          "counter": "make_app_optin_txn_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 Algorand MCP, apply this rule, and every make_app_optin_txn call is checked against it from then on.

FAQ

Questions about make_app_optin_txn

What does the make_app_optin_txn tool do? +

Create an application opt-in transaction. It is categorised as a Write tool in the Algorand MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on make_app_optin_txn? +

Register the Algorand MCP server in PolicyLayer and add a rule for make_app_optin_txn: 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 Algorand MCP. Nothing to install.

What risk level is make_app_optin_txn? +

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

Can I rate-limit make_app_optin_txn? +

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

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

make_app_optin_txn is provided by the Algorand MCP server (goplausible/algorand-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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