send_conversation_message · CustomGPT MCP Server MCP

WHAT IT DOES

What send_conversation_message does on CustomGPT MCP Server

AI agents use send_conversation_message to create or update resources in CustomGPT MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CustomGPT MCP Server environment.

WHY IT NEEDS A POLICY

Why send_conversation_message needs a policy

Sending a message creates a new message record in the conversation, which is a reversible write operation (messages can typically be edited or deleted). It does not execute arbitrary code, delete data irreversibly, or move money.

From the tool's definition Tool name 'send_conversation_message' and description 'Send a message to a specific conversation session' indicate creating/adding message data to an existing conversation resource.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_conversation_message Rate-limited

send_conversation_message 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": {
    "send_conversation_message": {
      "limits": [
        {
          "counter": "send_conversation_message_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 CustomGPT MCP Server, so you can run agents against it safely.

FAQ

Questions about send_conversation_message

What does the send_conversation_message tool do? +

Send a message to a specific conversation session. It is categorised as a Write tool in the CustomGPT MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on send_conversation_message? +

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

What risk level is send_conversation_message? +

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

Can I rate-limit send_conversation_message? +

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

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

send_conversation_message is provided by the CustomGPT MCP Server MCP server (poll-the-people/customgpt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.