smartlead_update_lead_by_id

THE RISK

Medium Risk

Why smartlead_update_lead_by_id needs a policy

This tool modifies lead records reversibly by updating contact details and custom fields. It does not execute code, delete data irreversibly, or transfer funds. It falls squarely into the Write category.

From the tool's definition Tool description states "Update lead information using the lead ID, including contact details and custom fields." The verb "Update" indicates modification of existing data.

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

POLICY

How to control smartlead_update_lead_by_id

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_update_lead_by_id:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "smartlead_update_lead_by_id": {
      "limits": [
        {
          "counter": "smartlead_update_lead_by_id_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

smartlead_update_lead_by_id stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

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.

LIMIT THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about smartlead_update_lead_by_id

What does the smartlead_update_lead_by_id tool do? +

Update lead information using the lead ID, including contact details and custom fields. It is categorised as a Write tool in the SmartLead MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on smartlead_update_lead_by_id? +

Register the SmartLead MCP Server MCP server in PolicyLayer and add a rule for smartlead_update_lead_by_id: 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_update_lead_by_id? +

smartlead_update_lead_by_id is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit smartlead_update_lead_by_id? +

Yes. Add a rate_limit block to the smartlead_update_lead_by_id 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_update_lead_by_id completely? +

Set action: deny in the PolicyLayer policy for smartlead_update_lead_by_id. 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_update_lead_by_id? +

smartlead_update_lead_by_id is provided by the SmartLead MCP Server MCP server (win8428/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 →