free_chat

THE RISK

Low Risk

Why free_chat needs a policy

The description is empty and uninformative. The name 'free_chat' suggests it may be a chat function (possibly using free models), similar to 'chat_with_model' on the same server, which would be an Execute-level tool (invoking external AI API calls). However, without a description, confidence is very low.

From the tool's definition Tool name is 'free_chat' with an empty description. No information about what the tool does beyond the name.

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

POLICY

How to control free_chat

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "free_chat": {
      "limits": [
        {
          "counter": "free_chat_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

free_chat gets a rate cap, and everything else on the server is denied unless you say otherwise.

Create a free account and register OpenRouter 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.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More OpenRouter MCP Server tools

Execute chat_with_model chat_with_model Execute chat_with_vision chat_with_vision Read get_free_model_metrics View performance metrics for free models (response time, success rate, throughput). Read get_usage_stats get_usage_stats Read list_available_models list_available_models Read list_free_models List all available free models with quality scores and availability status. Read list_vision_models list_vision_models Other my_tool my_tool

All 9 OpenRouter MCP Server tools →

Other tools on other servers

Android Forensics ADB MCP Server generate_app_analysis_report Ethereum Tools add Math MCP Server complex_analysis_suite Crypto_MCP aes_encrypt

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about free_chat

What does the free_chat tool do? +

free_chat. It is categorised as a Other tool in the OpenRouter MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on free_chat? +

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

What risk level is free_chat? +

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

Can I rate-limit free_chat? +

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

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

free_chat is provided by the OpenRouter MCP Server MCP server (physics91/openrouter-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OpenRouter MCP Server tool call.

Start from OpenRouter 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 →