List saved versions for a canvas (most recent first). Combine with version_restore to replay a specific labeled snapshot.
AI agents call version_list 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 retrieves and enumerates existing version metadata from a canvas's history. It performs no write, delete, or execute operations. The information returned is read-only, and the user must explicitly invoke a separate tool (version_restore) to actually restore a version. Minimal blast radius; misuse would only expose historical canvas snapshots already accessible to the agent or user.
From the tool's definition Tool description states 'List saved versions for a canvas' — a retrieval operation with no modification. Name 'version_list' and behavior 'most recent first' confirm it queries historical snapshots without side effects.
Attacks that exploit this kind of access
List saved versions for a canvas (most recent first). Combine with version_restore to replay a specific labeled snapshot. 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 version_list: 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.
version_list 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 version_list 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 version_list. 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.
version_list 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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