PTV

Calculate gas molar volume using equation of state

SERVEREngScript Engineering MCP SOURCEhttps://engscript.com/mcp

Low RISK CLASS

Category Other

Parameters 32 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-engscript-mcp/ptv.md

WHAT IT DOES

What PTV does on EngScript Engineering MCP

AI agents call PTV as a supporting operation in EngScript Engineering MCP workflows.

Parameter	Type	Required	Description
`P`	object	Yes	Pressure
`T`	object	Yes	Temperature
`V_unit`	string	—	Output molar volume unit

Parameters from the server's own tool schema.

RISK

Why PTV is rated Low

Without any rule in front of it, every call an agent makes to PTV happens silently: no trail, no cap, no way to know it misbehaved until something breaks downstream.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs PTV safely

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

PTV Rate-limited

PTV gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "PTV": {
      "limits": [
        {
          "counter": "ptv_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about PTV

What does the PTV tool do? +

Calculate gas molar volume using equation of state. It is categorised as a Other tool in the EngScript Engineering MCP MCP Server, which means it performs auxiliary operations.

What parameters does PTV accept? +

PTV accepts 3 parameters: P, T, V_unit. Required: P, T. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on PTV? +

Register the EngScript Engineering MCP server in PolicyLayer and add a rule for PTV: 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 EngScript Engineering MCP. Nothing to install.

What risk level is PTV? +

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

Can I rate-limit PTV? +

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

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

PTV is provided by the EngScript Engineering MCP server (https://engscript.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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