visual_create_baseline · DevLab MCP Suite MCP: Risk & Policy

WHAT IT DOES

What visual_create_baseline does on DevLab MCP Suite

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

WHY IT NEEDS A POLICY

Why visual_create_baseline needs a policy

The tool creates or modifies baseline image data used for regression testing. While not destructive (baselines can be recreated), it is a write operation that establishes reference state.

From the tool's definition Tool description states "Copy a source image to a baseline location" — this is a create/write operation that stores baseline data for visual regression testing.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

visual_create_baseline Rate-limited

visual_create_baseline 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": {
    "visual_create_baseline": {
      "limits": [
        {
          "counter": "visual_create_baseline_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 DevLab MCP Suite, so you can run agents against it safely.

FAQ

Questions about visual_create_baseline

What does the visual_create_baseline tool do? +

Copy a source image to a baseline location for future comparisons. It is categorised as a Write tool in the DevLab MCP Suite MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on visual_create_baseline? +

Register the DevLab MCP Suite MCP server in PolicyLayer and add a rule for visual_create_baseline: 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 DevLab MCP Suite. Nothing to install.

What risk level is visual_create_baseline? +

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

Can I rate-limit visual_create_baseline? +

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

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

visual_create_baseline is provided by the DevLab MCP Suite MCP server (tanguito86/devlab-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.