add_attachment_to_result · TestRail MCP Server MCP

WHAT IT DOES

What add_attachment_to_result does on TestRail MCP Server

AI agents use add_attachment_to_result 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_attachment_to_result needs a policy

This tool modifies test result data by attaching a file or document to it. While it does not delete or overwrite data (so not Destructive), and does not execute arbitrary code (so not Execute), it does create or add content to an existing resource, making it a Write operation.

From the tool's definition Tool name and description indicate it 'Add[s] an attachment to a test result', creating/adding content to an existing test result entity.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_attachment_to_result Rate-limited

add_attachment_to_result 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_attachment_to_result": {
      "limits": [
        {
          "counter": "add_attachment_to_result_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_attachment_to_result

What does the add_attachment_to_result tool do? +

Add an attachment to a test result. 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_attachment_to_result? +

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

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

Can I rate-limit add_attachment_to_result? +

Yes. Add a rate_limit block to the add_attachment_to_result 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_attachment_to_result completely? +

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

add_attachment_to_result 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.