list_agent_messages
AI agents call list_agent_messages 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 retrieves or queries message data with no side effects. The 'list' prefix aligns with Read operations. Even though the description is empty, the naming is clear and unambiguous for a retrieval function. Confidence is slightly reduced due to missing description, but the functional intent is evident.
From the tool's definition Tool name 'list_agent_messages' indicates a retrieval operation that queries and returns messages without modification. The 'list_' prefix is characteristic of Read category tools (list, get, fetch patterns).
Attacks that exploit this kind of access
list_agent_messages. 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_messages: 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_messages 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_messages 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_messages. 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_messages 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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