List participants in a chat room.
AI agents call list_agent_chat_participants to retrieve information from Thenvoi MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of participants in a chat room. It has no side effects—it does not create, modify, delete, or execute anything. It is purely informational retrieval, placing it firmly in the Read category with low severity since exposing chat participant lists has minimal security risk compared to tools that modify data or execute code.
From the tool's definition Tool name is 'list_agent_chat_participants' and description states it 'List participants in a chat room.' The verb 'list' is a classic read operation that retrieves information without modification.
Attacks that exploit this kind of access
List participants in a chat room. It is categorised as a Read tool in the Thenvoi MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Thenvoi MCP Server MCP server in PolicyLayer and add a rule for list_agent_chat_participants: 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.
list_agent_chat_participants is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_agent_chat_participants 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.
Set action: deny in the PolicyLayer policy for list_agent_chat_participants. 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.
list_agent_chat_participants 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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