add_milestone · TestRail MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_milestone does on TestRail MCP Server

AI agents use add_milestone 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 add_milestone needs a policy

The tool creates (adds) a new milestone in TestRail, which is a reversible modification to the test project's data structure. This is clearly a Write operation—data is created but can be subsequently modified or deleted. It does not destroy data (Destructive), execute arbitrary code (Execute), or move money (Financial).

From the tool's definition Tool name 'add_milestone' and description 'Create a new milestone' indicate creation of a new data object in TestRail, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_milestone Rate-limited

add_milestone 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": {
    "add_milestone": {
      "limits": [
        {
          "counter": "add_milestone_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 add_milestone

What does the add_milestone tool do? +

Create a new milestone. 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 add_milestone? +

Register the TestRail MCP Server MCP server in PolicyLayer and add a rule for add_milestone: 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 add_milestone? +

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

Can I rate-limit add_milestone? +

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

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

add_milestone is provided by the TestRail MCP Server MCP server (tenbarrel6/testrail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.