Return ALL client-side console output (log, info, warn, error, debug) plus uncaught errors and unhandled promise rejections, forwarded by <AgentBridge/>. Each entry has {ts, level, message, tabId}. Pass
AI agents call console_messages to retrieve information from Nextjs Agent without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and returns already-captured console messages from the browser; it has no side effects, does not modify any state, and cannot execute code or alter data. It is purely a read/query operation. Severity is low because it only exposes console output, though it could reveal sensitive debug information.
From the tool's definition Return ALL client-side console output (log, info, warn, error, debug) plus uncaught errors and unhandled promise rejections, forwarded by <AgentBridge/>
Attacks that exploit this kind of access
Return ALL client-side console output (log, info, warn, error, debug) plus uncaught errors and unhandled promise rejections, forwarded by <AgentBridge/>. Each entry has {ts, level, message, tabId}. Pass. It is categorised as a Read tool in the Nextjs Agent MCP Server, which means it retrieves data without modifying state.
Register the Nextjs Agent MCP server in PolicyLayer and add a rule for console_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 Nextjs Agent. Nothing to install.
console_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 console_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 console_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.
console_messages is provided by the Nextjs Agent MCP server (zohaib3249/nextjs-agent-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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