Add leads to a campaign (up to 100 leads at once).
AI agents use smartlead_add_lead_to_campaign to create or update resources in Smartlead Mcp Server Sse — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Smartlead Mcp Server Sse environment.
This tool creates new data records (lead-campaign associations) in the Smartlead system. While the effect is reversible (other tools allow deletion), it modifies the campaign's state and can impact the scope and recipients of email campaigns. The ability to add up to 100 leads at once increases the potential blast radius, warranting medium severity.
From the tool's definition The tool description explicitly states it adds leads to a campaign, which is a create/modify operation that creates new associations between leads and campaigns.
Documented attack patterns abuse exactly the kind of access smartlead_add_lead_to_campaign gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Smartlead Mcp Server Sse, and nothing reaches the server without passing your rules. This is the rule we recommend for smartlead_add_lead_to_campaign:
{
"version": "1",
"default": "deny",
"tools": {
"smartlead_add_lead_to_campaign": {
"limits": [
{
"counter": "smartlead_add_lead_to_campaign_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}smartlead_add_lead_to_campaign 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.
Free to start. No card required.
Add leads to a campaign (up to 100 leads at once). It is categorised as a Write tool in the Smartlead Mcp Server Sse MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Smartlead Mcp Server Sse MCP server in PolicyLayer and add a rule for smartlead_add_lead_to_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 Sse. Nothing to install.
smartlead_add_lead_to_campaign 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_add_lead_to_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.
Set action: deny in the PolicyLayer policy for smartlead_add_lead_to_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.
smartlead_add_lead_to_campaign is provided by the Smartlead Mcp Server Sse MCP server (jacob-dietle/smartlead-mcp-server-sse). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Smartlead Mcp Server Sse, 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.
15 Smartlead Mcp Server Sse tools catalogued and risk-classified — across an index of 43,000+ MCP servers.