AI agents call list_unconnected_pins 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 performs analysis and retrieval of design state information without creating, modifying, or deleting any data. The sibling tools on this server include write operations (add_*) and execute operations, but 'list_unconnected_pins' is clearly a read-only query operation. Although the description is empty, the name strongly indicates a passive inspection function.
From the tool's definition Tool name 'list_unconnected_pins' indicates a query/inspection operation that retrieves information about unconnected pins in a KiCad schematic or PCB, with no modification capability implied.
Attacks that exploit this kind of access
list_unconnected_pins. 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_unconnected_pins: 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_unconnected_pins 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_unconnected_pins 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_unconnected_pins. 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_unconnected_pins 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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