select_mask_tool

Select a mask tool: brush, graduated-filter, radial-filter, or range-mask.

SERVERLightroom Classic MCP SOURCE4xiomdev/lightroom-classic-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/4xiomdev-lightroom-classic-mcp/select-mask-tool.md

WHAT IT DOES

What select_mask_tool does on Lightroom Classic MCP

AI agents invoke select_mask_tool to trigger actions in Lightroom Classic MCP. 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.

RISK

Why select_mask_tool is rated High

This tool changes the active tool/mode in Lightroom Classic, which is an external application operation. It doesn't read data, write persistent data changes, or destroy anything — it triggers a UI state change in the application, making Execute the most appropriate category. Severity is low as selecting a tool alone has minimal blast radius; actual edits require subsequent actions.

From the tool's definition 'Select a mask tool: brush, graduated-filter, radial-filter, or range-mask' — triggers an external operation within Lightroom Classic UI, activating a specific tool mode

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs select_mask_tool safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Lightroom Classic MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For select_mask_tool, this is the rule to start with:

select_mask_tool Rate-limited

select_mask_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": {
    "select_mask_tool": {
      "limits": [
        {
          "counter": "select_mask_tool_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Lightroom Classic MCP, apply this rule, and every select_mask_tool call is checked against it from then on.

FAQ

Questions about select_mask_tool

What does the select_mask_tool tool do? +

Select a mask tool: brush, graduated-filter, radial-filter, or range-mask. It is categorised as a Execute tool in the Lightroom Classic MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on select_mask_tool? +

Register the Lightroom Classic MCP server in PolicyLayer and add a rule for select_mask_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 Lightroom Classic MCP. Nothing to install.

What risk level is select_mask_tool? +

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

Can I rate-limit select_mask_tool? +

Yes. Add a rate_limit block to the select_mask_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 select_mask_tool completely? +

Set action: deny in the PolicyLayer policy for select_mask_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 select_mask_tool? +

select_mask_tool is provided by the Lightroom Classic MCP server (4xiomdev/lightroom-classic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Lightroom Classic, and thousands of servers like it.

This server

All 59 Lightroom Classic tools → High-risk tools on this server →

Across the catalogue

All high-risk MCP tools → The MCP Attack Database →

Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →