AI agents call remove_from_blocklist to permanently remove resources in Mcp Ap2 — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing an entry from a blocklist is an irreversible security action that re-enables previously blocked entities (e.g., fraudulent users, IPs, or payment instruments). In a payment/authorization context (AP2 — Agent-to-Agent Payment Protocol), this could allow previously flagged bad actors to transact again, making the blast radius high. The action cannot be easily undone as it restores access to a blocked entity.
From the tool's definition 'Remove a value from the Konduto blocklist' — permanently removes an entry from a security blocklist
Documented attack patterns abuse exactly the kind of access remove_from_blocklist gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for remove_from_blocklist:
{
"version": "1",
"default": "deny",
"hide": [
"remove_from_blocklist"
]
} remove_from_blocklist disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Remove a value from the Konduto blocklist. It is categorised as a Destructive tool in the Mcp Ap2 MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for remove_from_blocklist: 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 Mcp Ap2. Nothing to install.
remove_from_blocklist 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 remove_from_blocklist 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 remove_from_blocklist. 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.
remove_from_blocklist is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
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