Create a new client (alias for add client to system).
AI agents use smartlead_create_client to create or update resources in SmartLead MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SmartLead MCP Server environment.
Creating a new client is a reversible write operation that adds data to the system. It has medium severity because misconfiguration could add unauthorized clients or lead to spam/abuse of the cold email system, but the operation itself is not destructive and doesn't execute arbitrary code or move money. The blast radius is contained to client account creation within the SmartLead platform.
From the tool's definition Tool description states 'Create a new client' and is an 'alias for add client to system'. The action creates a new entity in the system, modifying the database state by adding a client record.
Documented attack patterns abuse exactly the kind of access smartlead_create_client gives an agent:
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_create_client:
{
"version": "1",
"default": "deny",
"tools": {
"smartlead_create_client": {
"limits": [
{
"counter": "smartlead_create_client_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}smartlead_create_client 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.
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Create a new client (alias for add client to system). 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.
Register the SmartLead MCP Server MCP server in PolicyLayer and add a rule for smartlead_create_client: 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.
smartlead_create_client is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the smartlead_create_client 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 smartlead_create_client. 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.
smartlead_create_client 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.
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.
Free to start. No card required.
116 SmartLead MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.