toggle_mask_overlay
Toggle the mask overlay visualization on/off.
This record as markdown: /tools/4xiomdev-lightroom-classic-mcp/toggle-mask-overlay.md
What toggle_mask_overlay does on Lightroom Classic MCP
AI agents invoke toggle_mask_overlay 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.
Why toggle_mask_overlay is rated High
This tool triggers a UI state change in Lightroom Classic (toggling a visual overlay), which is an external application operation rather than a simple data read or write. It affects the application's display state but has minimal blast radius as it is reversible and non-destructive to actual photo data.
From the tool's definition Toggle the mask overlay visualization on/off
Attacks that exploit this kind of access
The rule that runs toggle_mask_overlay 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 toggle_mask_overlay, this is the rule to start with:
toggle_mask_overlay 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Lightroom Classic MCP, apply this rule, and every toggle_mask_overlay call is checked against it from then on.
Questions about toggle_mask_overlay
Toggle the mask overlay visualization on/off. 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.
Register the Lightroom Classic MCP server in PolicyLayer and add a rule for toggle_mask_overlay: 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.
toggle_mask_overlay is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the toggle_mask_overlay 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.
Set action: deny in the PolicyLayer policy for toggle_mask_overlay. 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.
toggle_mask_overlay 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.
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