suggest_new_rules

THE RISK

Low Risk

Why suggest_new_rules needs a policy

The tool analyzes patterns and produces suggestions — it reads/analyzes existing data and outputs recommendations. It does not create or enforce rules (separate tools exist for that: create_session_rule, enforce_session_rules). The output is advisory/read-only. Severity is low since misuse would at worst produce unhelpful suggestions with no direct side effects.

From the tool's definition Analyze patterns and suggest new session rules

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

POLICY

How to control suggest_new_rules

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

policy.json

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

suggest_new_rules 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 MCP Conductor — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

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All 25 MCP Conductor tools →

Read tools on other servers

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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 suggest_new_rules

What does the suggest_new_rules tool do? +

Analyze patterns and suggest new session rules. It is categorised as a Read tool in the MCP Conductor MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on suggest_new_rules? +

Register the MCP Conductor MCP server in PolicyLayer and add a rule for suggest_new_rules: 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 MCP Conductor. Nothing to install.

What risk level is suggest_new_rules? +

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

Can I rate-limit suggest_new_rules? +

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

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

suggest_new_rules is provided by the MCP Conductor MCP server (lutherscottgarcia/mcp-conductor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Conductor tool call.

Start from MCP Conductor, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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