threshold · farshid-mcp-imageProcessing MCP: Risk & Policy

WHAT IT DOES

What threshold does on farshid-mcp-imageProcessing

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

WHY IT NEEDS A POLICY

Why threshold needs a policy

This tool processes and transforms image data by applying a binary threshold operation, producing a modified output image. It creates/modifies image data reversibly (the original source image is not destroyed), placing it in the Write category. Severity is low as it only affects image processing operations with limited blast radius.

From the tool's definition 'Binary threshold' with methods including binary, binary_inv, otsu, adaptive_mean, adaptive_gaussian — applies a thresholding transform to image data

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

threshold Rate-limited

threshold 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": {
    "threshold": {
      "limits": [
        {
          "counter": "threshold_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 farshid-mcp-imageProcessing, so you can run agents against it safely.

FAQ

Questions about threshold

What does the threshold tool do? +

Binary threshold. method: binary, binary_inv, otsu, adaptive_mean, adaptive_gaussian. It is categorised as a Write tool in the farshid-mcp-imageProcessing MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on threshold? +

Register the farshid-mcp-imageProcessing MCP server in PolicyLayer and add a rule for threshold: 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 farshid-mcp-imageProcessing. Nothing to install.

What risk level is threshold? +

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

Can I rate-limit threshold? +

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

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

threshold is provided by the farshid-mcp-imageProcessing MCP server (pirahansiah/farshid-mcp-imageprocessing). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.