create_run · TestRail MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_run does on TestRail MCP Server

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

WHY IT NEEDS A POLICY

Why create_run needs a policy

This tool creates a new test run in TestRail, which is a reversible write operation that adds data to the system. It does not execute arbitrary code, delete data, or move money. While it modifies project state, the action is non-destructive and can typically be undone by deleting the created run.

From the tool's definition Tool name 'create_run' and description 'Create new test run' indicate a data creation operation that modifies TestRail project state by adding a new test run record.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_run Rate-limited

create_run 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": {
    "create_run": {
      "limits": [
        {
          "counter": "create_run_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 TestRail MCP Server, so you can run agents against it safely.

FAQ

Questions about create_run

What does the create_run tool do? +

Create new test run. It is categorised as a Write tool in the TestRail 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 create_run? +

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

What risk level is create_run? +

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

Can I rate-limit create_run? +

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

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

create_run is provided by the TestRail MCP Server MCP server (samuelvinay91/testrail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.