List all unique component reference designators (R, C, U, etc.)
AI agents call list_component_types to retrieve information from KiCad MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves reference designator information from the KiCad database—a read-only operation with no side effects, ability to modify data, execute code, or cause financial impact. The blast radius of misuse is minimal: an agent could only enumerate component types already in the library. Listed among sibling tools that all perform safe retrieval operations (search, get details, get by type).
From the tool's definition Tool name 'list_component_types' and description 'List all unique component reference designators' indicate a query operation that retrieves and enumerates metadata from the KiCad symbol library without modification or execution.
Attacks that exploit this kind of access
List all unique component reference designators (R, C, U, etc.). It is categorised as a Read tool in the KiCad MCP Server MCP Server, which means it retrieves data without modifying state.
Register the KiCad MCP Server MCP server in PolicyLayer and add a rule for list_component_types: 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 MCP Server. Nothing to install.
list_component_types 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_component_types 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_component_types. 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_component_types is provided by the KiCad MCP Server MCP server (skeptomai/kicad_mcp). 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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