openroad_pdn

SERVERMcp Openroad SOURCE@zesun33/mcp-openroad

Low RISK CLASS

Category Other

Parameters 62 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/zesun33-mcp-openroad/openroad-pdn.md

WHAT IT DOES

What openroad_pdn does on Mcp Openroad

AI agents call openroad_pdn as a supporting operation in Mcp Openroad workflows.

Parameter	Type	Required	Description
`cwd`	string	—	Optional working directory.
`platform`	string	—	Process platform (use 'sky130'; nangate45 errors honestly).
`output_def`	string	—	Output DEF with PDN straps.
`placed_def`	string	Yes	Placed DEF file path (after openroad_place / tapcells).
`timeout_ms`	number	—	Timeout in milliseconds.
`top_module`	string	Yes	Name of the top-level module.

Parameters from the server's own tool schema.

RISK

Why openroad_pdn is rated Low

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

Risk signalsAccepts file system path (cwd)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs openroad_pdn safely

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

openroad_pdn Rate-limited

openroad_pdn 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": {
    "openroad_pdn": {
      "limits": [
        {
          "counter": "openroad_pdn_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 Mcp Openroad, apply this rule, and every openroad_pdn call is checked against it from then on.

FAQ

Questions about openroad_pdn

What does the openroad_pdn tool do? +

Inserts a stdcell power grid (followpins rails + upper-layer straps). Sky130 only. The step tool takes a placed DEF; inside openroad_pnr, PDN runs after floorplan/tap and before place so GPL sees straps. Platforms without PDN config error honestly. It is categorised as a Other tool in the Mcp Openroad MCP Server, which means it performs auxiliary operations.

What parameters does openroad_pdn accept? +

openroad_pdn accepts 6 parameters: cwd, platform, output_def, placed_def, timeout_ms, top_module. Required: placed_def, top_module. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on openroad_pdn? +

Register the Mcp Openroad MCP server in PolicyLayer and add a rule for openroad_pdn: 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 Openroad. Nothing to install.

What risk level is openroad_pdn? +

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

Can I rate-limit openroad_pdn? +

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

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

openroad_pdn is provided by the Mcp Openroad MCP server (@zesun33/mcp-openroad). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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