add_negative_keywords · SergeyKrin9/mcp Servers MCP

WHAT IT DOES

What add_negative_keywords does on SergeyKrin9/mcp Servers

AI agents use add_negative_keywords to create or update resources in SergeyKrin9/mcp Servers — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SergeyKrin9/mcp Servers environment.

WHY IT NEEDS A POLICY

Why add_negative_keywords needs a policy

Adding negative keywords is a reversible modification operation that changes campaign settings without deleting data or executing arbitrary code. It affects ad delivery by excluding certain search terms, which could impact campaign performance, justifying medium severity. The operation can be undone by removing the keywords later.

From the tool's definition Tool description states 'Add negative keywords to a campaign' — this is a create/modify operation that updates campaign configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_negative_keywords Rate-limited

add_negative_keywords 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SergeyKrin9/mcp Servers, so you can run agents against it safely.

FAQ

Questions about add_negative_keywords

What does the add_negative_keywords tool do? +

Add negative keywords to a campaign. It is categorised as a Write tool in the SergeyKrin9/mcp Servers MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_negative_keywords? +

Register the SergeyKrin9/mcp Servers MCP server in PolicyLayer and add a rule for add_negative_keywords: 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 SergeyKrin9/mcp Servers. Nothing to install.

What risk level is add_negative_keywords? +

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

Can I rate-limit add_negative_keywords? +

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

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

add_negative_keywords is provided by the SergeyKrin9/mcp Servers MCP server (sergeykrin9/mcp-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.