add_agent_chat_participant · Thenvoi MCP Server MCP

WHAT IT DOES

What add_agent_chat_participant does on Thenvoi MCP Server

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

WHY IT NEEDS A POLICY

Why add_agent_chat_participant needs a policy

This tool modifies chat room state by adding participants, which is a write operation that creates or modifies data reversibly. While the description is empty (lowering confidence slightly), the name and context from sibling tools clearly indicate this creates new participant associations in a chat system.

From the tool's definition Tool name is 'add_agent_chat_participant' which indicates adding/modifying participant membership in a chat. Related sibling tools like 'create_agent_chat' and 'create_my_chat' are write operations that create chat resources.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_agent_chat_participant Rate-limited

add_agent_chat_participant 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_agent_chat_participant": {
      "limits": [
        {
          "counter": "add_agent_chat_participant_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 Thenvoi MCP Server, so you can run agents against it safely.

FAQ

Questions about add_agent_chat_participant

What does the add_agent_chat_participant tool do? +

add_agent_chat_participant. It is categorised as a Write tool in the Thenvoi 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 add_agent_chat_participant? +

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

What risk level is add_agent_chat_participant? +

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

Can I rate-limit add_agent_chat_participant? +

Yes. Add a rate_limit block to the add_agent_chat_participant 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_agent_chat_participant completely? +

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

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