Remove a rulebook from the current campaign.
AI agents call unload_rulebook to permanently remove resources in DM20 Protocol — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Unloading/removing a rulebook from the campaign is a destructive action — it removes an indexed resource (likely including its RAG embeddings/data) from the campaign context. This is not easily reversible without re-uploading and re-indexing the PDF.
From the tool's definition "Remove a rulebook from the current campaign"
Attacks that exploit this kind of access
Remove a rulebook from the current campaign. It is categorised as a Destructive tool in the DM20 Protocol MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the DM20 Protocol MCP server in PolicyLayer and add a rule for unload_rulebook: 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 DM20 Protocol. Nothing to install.
unload_rulebook is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the unload_rulebook 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 unload_rulebook. 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.
unload_rulebook is provided by the DM20 Protocol MCP server (polloinfilzato/dm20-protocol). 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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