buy_pt

Buy PT (Principal Token) from a Pendle market for fixed yield at maturity

SERVERWaiaas SOURCEminhoyoo-iotrust/waiaas

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/minhoyoo-iotrust-waiaas/buy-pt.md

WHAT IT DOES

What buy_pt does on Waiaas

AI agents use buy_pt to commit financial operations through Waiaas, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why buy_pt is rated Critical

This tool executes a financial transaction on a DeFi protocol (Pendle), purchasing Principal Tokens which involves committing funds from the wallet. It moves crypto assets in exchange for fixed-yield instruments, constituting a financial commitment that cannot be trivially reversed without additional market operations.

From the tool's definition Buy PT (Principal Token) from a Pendle market for fixed yield at maturity

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs buy_pt safely

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

buy_pt Approval-gated

Any call to buy_pt is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "buy_pt": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about buy_pt

What does the buy_pt tool do? +

Buy PT (Principal Token) from a Pendle market for fixed yield at maturity. It is categorised as a Financial tool in the Waiaas MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on buy_pt? +

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

What risk level is buy_pt? +

buy_pt is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit buy_pt? +

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

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

buy_pt is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Waiaas, and thousands of servers like it.

This server

All 126 Waiaas tools → Critical-risk tools on this server →

Across the catalogue

buy_now on Ebay → All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →