get_chat_messages · Evolution API MCP Server MCP

WHAT IT DOES

What get_chat_messages does on Evolution API MCP Server

AI agents call get_chat_messages to retrieve information from Evolution API MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get_chat_messages needs a policy

This tool retrieves chat message history from WhatsApp conversations. While it performs only read operations, the severity is medium rather than low because accessing chat messages could expose sensitive personal communication, contact information, and conversation context that an AI agent might misuse (e.g., extracting PII, analyzing private conversations without consent, or using message content inappropriately).

From the tool's definition Tool name 'get_chat_messages' indicates retrieval of message data. Sibling tools include 'find_messages', 'get_contact_name_by_number', 'get_contacts', 'get_instance_info', 'list_chats'—all read-only queries.

Attacks that exploit this kind of access

Questions about get_chat_messages

What does the get_chat_messages tool do? +

get_chat_messages. It is categorised as a Read tool in the Evolution API MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_chat_messages? +

Register the Evolution API MCP Server MCP server in PolicyLayer and add a rule for get_chat_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 Evolution API MCP Server. Nothing to install.

What risk level is get_chat_messages? +

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

Can I rate-limit get_chat_messages? +

Yes. Add a rate_limit block to the get_chat_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.

How do I block get_chat_messages completely? +

Set action: deny in the PolicyLayer policy for get_chat_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.

What MCP server provides get_chat_messages? +

get_chat_messages is provided by the Evolution API MCP Server MCP server (pablobispo/evoapi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.