search_b2b_ads

THE RISK

Low Risk

Why search_b2b_ads needs a policy

This tool retrieves and queries B2B advertising data without creating, modifying, deleting, or executing operations. It is a read-only data lookup function that returns information about advertising campaigns, consistent with the server's stated purpose of 'researching advertising campaigns'. No side effects or irreversible actions are implied.

From the tool's definition Tool is named 'search_b2b_ads' and described as 'Search for B2B Ads based on company'. The verb 'search' indicates data retrieval with no modification or execution of external operations.

Documented attack patterns abuse exactly the kind of access search_b2b_ads gives an agent:

POLICY

How to control search_b2b_ads

PolicyLayer is an MCP gateway — it sits between your AI agents and LeadMagic MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_b2b_ads:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "search_b2b_ads": {}
  }
}

search_b2b_ads is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register LeadMagic 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about search_b2b_ads

What does the search_b2b_ads tool do? +

Search for B2B Ads based on company\. It is categorised as a Read tool in the LeadMagic MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_b2b_ads? +

Register the LeadMagic MCP Server MCP server in PolicyLayer and add a rule for search_b2b_ads: 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 LeadMagic MCP Server. Nothing to install.

What risk level is search_b2b_ads? +

search_b2b_ads is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit search_b2b_ads? +

Yes. Add a rate_limit block to the search_b2b_ads 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 search_b2b_ads completely? +

Set action: deny in the PolicyLayer policy for search_b2b_ads. 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 search_b2b_ads? +

search_b2b_ads is provided by the LeadMagic MCP Server MCP server (leadmagic/leadmagic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every LeadMagic MCP Server tool call.

Start from LeadMagic 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 →