AI agents call list_schematic_components to retrieve information from Kicad without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about components already present in a schematic without creating, modifying, or deleting any data. It has no side effects and presents no risk of unintended modifications or data loss. The blast radius of misuse is minimal—an AI agent could only enumerate existing design information.
From the tool's definition Tool name 'list_schematic_components' and description 'List all placed components in the schematic' indicate a query/retrieval operation with no modification of data.
Attacks that exploit this kind of access
List all placed components in the schematic. It is categorised as a Read tool in the Kicad MCP Server, which means it retrieves data without modifying state.
Register the Kicad MCP server in PolicyLayer and add a rule for list_schematic_components: 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 Kicad. Nothing to install.
list_schematic_components is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_schematic_components 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 list_schematic_components. 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.
list_schematic_components is provided by the Kicad MCP server (productofamerica/mcp-server-kicad). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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