affinity_open_file · Affinity MCP Server MCP: Risk & Policy

WHAT IT DOES

What affinity_open_file does on Affinity MCP Server

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

WHY IT NEEDS A POLICY

Why affinity_open_file needs a policy

An AI agent can call affinity_open_file faster than any human can review — one bad instruction and it creates or modifies resources in Affinity MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

affinity_open_file Rate-limited

affinity_open_file 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": {
    "affinity_open_file": {
      "limits": [
        {
          "counter": "affinity_open_file_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 Affinity MCP Server, so you can run agents against it safely.

FAQ

Questions about affinity_open_file

What does the affinity_open_file tool do? +

Open a file in Affinity (image, .af, .psd, .svg, etc.). It is categorised as a Write tool in the Affinity 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 affinity_open_file? +

Register the Affinity MCP Server MCP server in PolicyLayer and add a rule for affinity_open_file: 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 Affinity MCP Server. Nothing to install.

What risk level is affinity_open_file? +

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

Can I rate-limit affinity_open_file? +

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

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

affinity_open_file is provided by the Affinity MCP Server MCP server (sekharmalla/affinity-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

affinity_open_file is one line of Affinity MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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