openroad_sta

Performs static timing analysis using OpenSTA on placed or routed DEF files, reporting Worst Negative Slack (WNS), Total Negative Slack (TNS), and critical paths.

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-sta.md

WHAT IT DOES

What openroad_sta does on Mcp Openroad

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

Parameter	Type	Required	Description
`cwd`	string	—	Optional working directory.
`def_file`	string	Yes	DEF file path (placed or routed).
`sdc_file`	string	—	Optional SDC timing constraints file path.
`timeout_ms`	number	—	Timeout in milliseconds.
`top_module`	string	Yes	Name of the top-level module.
`clock_period_ns`	number	—	Target clock period in ns (default: 1.0).

Parameters from the server's own tool schema.

RISK

Why openroad_sta is rated Low

Without any rule in front of it, every call an agent makes to openroad_sta 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_sta 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_sta, this is the rule to start with:

openroad_sta Rate-limited

openroad_sta 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_sta": {
      "limits": [
        {
          "counter": "openroad_sta_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_sta call is checked against it from then on.

FAQ

Questions about openroad_sta

What does the openroad_sta tool do? +

Performs static timing analysis using OpenSTA on placed or routed DEF files, reporting Worst Negative Slack (WNS), Total Negative Slack (TNS), and critical paths. It is categorised as a Other tool in the Mcp Openroad MCP Server, which means it performs auxiliary operations.

What parameters does openroad_sta accept? +

openroad_sta accepts 6 parameters: cwd, def_file, sdc_file, timeout_ms, top_module, clock_period_ns. Required: def_file, 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_sta? +

Register the Mcp Openroad MCP server in PolicyLayer and add a rule for openroad_sta: 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_sta? +

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

Can I rate-limit openroad_sta? +

Yes. Add a rate_limit block to the openroad_sta 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_sta completely? +

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

openroad_sta 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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