Read recent messages from a Rocket.Chat room (channel, private
AI agents call get_messages to retrieve information from Rocket Cli without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical messages from a channel or private room without creating, modifying, or deleting any data. It is a pure read operation with no side effects. Severity is low because message retrieval poses minimal security risk — the primary concern would be exposure of sensitive message content, but that depends on access controls already in place in Rocket.Chat.
From the tool's definition Tool name 'get_messages' and description 'Read recent messages from a Rocket.Chat room' indicate data retrieval with no modification.
Attacks that exploit this kind of access
Read recent messages from a Rocket.Chat room (channel, private. It is categorised as a Read tool in the Rocket Cli MCP Server, which means it retrieves data without modifying state.
Register the Rocket Cli MCP server in PolicyLayer and add a rule for get_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 Rocket Cli. Nothing to install.
get_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 get_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 get_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.
get_messages is provided by the Rocket Cli MCP server (jeanfbrito/rocket-cli). 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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