payware_poi_set_price · Payware MCP Server MCP

WHAT IT DOES

What payware_poi_set_price does on Payware MCP Server

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

WHY IT NEEDS A POLICY

Why payware_poi_set_price needs a policy

This tool modifies the state of a Point of Interest (POI) by setting a payment price, causing it to transition to READY state. It creates or modifies data (the pending price) in a reversible way (TTL expires, can be changed), but directly influences the amount a customer will be charged.

From the tool's definition Set a pending price on a POI for customer payment... Set the amount a customer should pay when they scan the POI

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

payware_poi_set_price Rate-limited

payware_poi_set_price 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": {
    "payware_poi_set_price": {
      "limits": [
        {
          "counter": "payware_poi_set_price_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Payware MCP Server, so you can run agents against it safely.

FAQ

Questions about payware_poi_set_price

What does the payware_poi_set_price tool do? +

Set a pending price on a POI for customer payment. ISV Authentication: Uses ISV JWT with merchant partner ID and OAuth2 token. Endpoint: PUT /poi/{poiId}/price Use Case: Set the amount a customer should pay when they scan the POI. The POI will transition to READY state and wait for a customer scan until the TTL expires. Required: POI ID, amount, currency, reason, Merchant Partner ID, and OAuth2 token. It is categorised as a Write tool in the Payware MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on payware_poi_set_price? +

Register the Payware MCP Server MCP server in PolicyLayer and add a rule for payware_poi_set_price: 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 Payware MCP Server. Nothing to install.

What risk level is payware_poi_set_price? +

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

Can I rate-limit payware_poi_set_price? +

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

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

payware_poi_set_price is provided by the Payware MCP Server MCP server (payware/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.