create_suite · Testrail MCP: Risk & Policy

WHAT IT DOES

What create_suite does on Testrail

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

WHY IT NEEDS A POLICY

Why create_suite needs a policy

This tool creates new test suites in TestRail, which modifies project structure reversibly. It is a Write operation (not Destructive, as suites can be deleted or modified later). The blast radius is medium because creating suites could disrupt project organization or test management workflows, but the action is reversible and doesn't affect test results or data integrity directly.

From the tool's definition Create a new TestRail suite in a project — the word 'Create' indicates a data modification operation that adds a new suite resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_suite Rate-limited

create_suite 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_suite": {
      "limits": [
        {
          "counter": "create_suite_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, so you can run agents against it safely.

FAQ

Questions about create_suite

What does the create_suite tool do? +

Create a new TestRail suite in a project (only works on multi-suite projects). It is categorised as a Write tool in the Testrail 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_suite? +

Register the Testrail MCP server in PolicyLayer and add a rule for create_suite: 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. Nothing to install.

What risk level is create_suite? +

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

Can I rate-limit create_suite? +

Yes. Add a rate_limit block to the create_suite 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_suite completely? +

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

create_suite is provided by the Testrail MCP server (sergey-bl/testrail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.