List items in an Excalidraw library. Source is one of: libraryUrl (HTTPS, e.g. libraries.excalidraw.com), libraryPath (absolute local file), or userLibraryName (saved via user_library_save). Returns per-item metadata (index, name, element count, bbox).
AI agents call library_list_items to retrieve information from Whiteboard without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and retrieves information about library items without creating, modifying, executing, or deleting any data. It is a straightforward read operation that returns metadata about existing Excalidraw library contents. No side effects or state changes occur.
From the tool's definition Tool description states it 'List items in an Excalidraw library' and 'Returns per-item metadata (index, name, element count, bbox)'. The verb 'list' and the retrieval-only nature of returning metadata indicates no modification or execution of operations.
Attacks that exploit this kind of access
List items in an Excalidraw library. Source is one of: libraryUrl (HTTPS, e.g. libraries.excalidraw.com), libraryPath (absolute local file), or userLibraryName (saved via user_library_save). Returns per-item metadata (index, name, element count, bbox). It is categorised as a Read tool in the Whiteboard MCP Server, which means it retrieves data without modifying state.
Register the Whiteboard MCP server in PolicyLayer and add a rule for library_list_items: 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 Whiteboard. Nothing to install.
library_list_items 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 library_list_items 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 library_list_items. 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.
library_list_items is provided by the Whiteboard MCP server (kamiazya/whiteboard). 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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