affinity_select_tool · Affinity MCP Server MCP

WHAT IT DOES

What affinity_select_tool does on Affinity MCP Server

AI agents invoke affinity_select_tool to trigger actions in Affinity MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why affinity_select_tool needs a policy

This tool triggers keyboard shortcut execution via AppleScript/System Events to change the active tool in Affinity. It performs an action (sending keystrokes) that affects the application state. While selecting a tool alone doesn't create or destroy data, it executes system-level input simulation that can have downstream effects depending on what operations follow.

From the tool's definition Select a drawing/editing tool via keyboard shortcut

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

affinity_select_tool Rate-limited

affinity_select_tool stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_select_tool": {
      "limits": [
        {
          "counter": "affinity_select_tool_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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_select_tool

What does the affinity_select_tool tool do? +

Select a drawing/editing tool via keyboard shortcut. It is categorised as a Execute tool in the Affinity MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on affinity_select_tool? +

Register the Affinity MCP Server MCP server in PolicyLayer and add a rule for affinity_select_tool: 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_select_tool? +

affinity_select_tool is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit affinity_select_tool? +

Yes. Add a rate_limit block to the affinity_select_tool 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_select_tool completely? +

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

affinity_select_tool 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.