smartlead_unsubscribe_lead_from_campaign

THE RISK

Critical Risk

Why smartlead_unsubscribe_lead_from_campaign needs a policy

Unsubscribing a lead from a campaign is an irreversible action that permanently stops all future emails to that lead within the campaign. While not deleting data outright, it terminates the lead's participation in the campaign in a way that is typically not easily reversible and has significant operational impact on cold email outreach workflows.

From the tool's definition Unsubscribe a lead from a specific campaign, stopping all future emails

Documented attack patterns abuse exactly the kind of access smartlead_unsubscribe_lead_from_campaign gives an agent:

POLICY

How to control smartlead_unsubscribe_lead_from_campaign

PolicyLayer is an MCP gateway — it sits between your AI agents and SmartLead MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for smartlead_unsubscribe_lead_from_campaign:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "smartlead_unsubscribe_lead_from_campaign"
  ]
}

smartlead_unsubscribe_lead_from_campaign disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register SmartLead MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More SmartLead MCP Server tools

Financial smartlead_place_order_for_mailboxes Place an order for specific mailboxes with a vendor. Destructive smartlead_delete_campaign Permanently delete a campaign and all associated data. This action cannot be undone. Destructive smartlead_delete_campaign_webhook Delete a specific webhook from a campaign. Destructive smartlead_delete_client_api_key Delete a specific API key. Destructive smartlead_delete_folder Delete a smart delivery folder by ID. Destructive smartlead_delete_lead_by_campaign Remove a lead from a specific campaign permanently. Destructive smartlead_delete_tests_in_bulk Delete multiple smart delivery tests at once for cleanup purposes. Destructive smartlead_remove_email_account_from_campaign Remove an email account from a specific campaign.

All 116 SmartLead MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in SmartLead MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about smartlead_unsubscribe_lead_from_campaign

What does the smartlead_unsubscribe_lead_from_campaign tool do? +

Unsubscribe a lead from a specific campaign, stopping all future emails. It is categorised as a Destructive tool in the SmartLead MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on smartlead_unsubscribe_lead_from_campaign? +

Register the SmartLead MCP Server MCP server in PolicyLayer and add a rule for smartlead_unsubscribe_lead_from_campaign: 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 SmartLead MCP Server. Nothing to install.

What risk level is smartlead_unsubscribe_lead_from_campaign? +

smartlead_unsubscribe_lead_from_campaign is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit smartlead_unsubscribe_lead_from_campaign? +

Yes. Add a rate_limit block to the smartlead_unsubscribe_lead_from_campaign 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.

How do I block smartlead_unsubscribe_lead_from_campaign completely? +

Set action: deny in the PolicyLayer policy for smartlead_unsubscribe_lead_from_campaign. 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.

What MCP server provides smartlead_unsubscribe_lead_from_campaign? +

smartlead_unsubscribe_lead_from_campaign is provided by the SmartLead MCP Server MCP server (leadmagic/smartlead-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every SmartLead MCP Server tool call.

Start from SmartLead MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →