This record as markdown: /tools/eda-agent/pcb-scale.md
What pcb_scale does on Eda Agent
AI agents invoke pcb_scale to trigger actions in Eda Agent. 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 pcb_scale is rated High
The tool operates within Altium Designer's persistent DelphiScript bridge for PCB automation. Scaling a PCB layout is an Execute action—it runs code that transforms design state based on parameters (scale factor, origin, etc.). While potentially reversible via undo, the tool itself performs irreversible mutations to the design data.
From the tool's definition Tool name 'pcb_scale' suggests a transform operation on PCB layout. Given the server context (290+ tools for 'schematic, PCB, library & project automation' with capabilities like 'auto-placement, panelization'), this tool almost certainly executes a scaling…
Attacks that exploit this kind of access
The rule that runs pcb_scale safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Eda Agent, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pcb_scale, this is the rule to start with:
pcb_scale 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 Eda Agent, apply this rule, and every pcb_scale call is checked against it from then on.
Questions about pcb_scale
pcb_scale is a execute tool on the Eda Agent MCP server. It is categorised as a Execute tool in the Eda Agent MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Eda Agent MCP server in PolicyLayer and add a rule for pcb_scale: 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 Eda Agent. Nothing to install.
pcb_scale 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 pcb_scale 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 pcb_scale. 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.
pcb_scale is provided by the Eda Agent MCP server (salitronic/eda-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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