This record as markdown: /tools/eda-agent/obj-zoom.md
What obj_zoom does on Eda Agent
AI agents invoke obj_zoom 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 obj_zoom is rated High
This tool triggers an external operation within Altium Designer (changing the viewport zoom), which affects the application's UI state. It's not purely a read operation since it modifies the view state, but it doesn't write/modify design data, making Execute the most appropriate category. Blast radius is low as it only affects the display/viewport.
From the tool's definition Control the viewport zoom level
Attacks that exploit this kind of access
The rule that runs obj_zoom 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 obj_zoom, this is the rule to start with:
obj_zoom 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 obj_zoom call is checked against it from then on.
Questions about obj_zoom
Control the viewport zoom level. 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 obj_zoom: 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.
obj_zoom 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 obj_zoom 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 obj_zoom. 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.
obj_zoom 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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