This record as markdown: /tools/1600822305-js-reverse-mcp/stop-monitor.md
What stop_monitor does on Js Reverse
AI agents invoke stop_monitor to trigger actions in Js Reverse. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why stop_monitor is rated High
Stopping an event monitor is an action that alters the state of an active debugging/monitoring session. While not destructive (the monitor can be restarted) and not read-only, it executes a control command via CDP that changes browser behavior. The medium severity reflects that misuse could disrupt legitimate debugging workflows, but the impact is reversible and limited to the current session.
From the tool's definition Tool controls Chrome DevTools Protocol to stop event monitors; part of a suite explicitly designed for 'control browsers' and debugging workflows. Stopping a monitor affects browser state and debugging session behavior.
Attacks that exploit this kind of access
The rule that runs stop_monitor safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Js Reverse, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For stop_monitor, this is the rule to start with:
stop_monitor stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Js Reverse, apply this rule, and every stop_monitor call is checked against it from then on.
Questions about stop_monitor
Stops an event monitor. It is categorised as a Execute tool in the Js Reverse MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Js Reverse MCP server in PolicyLayer and add a rule for stop_monitor: 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 Js Reverse. Nothing to install.
stop_monitor is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the stop_monitor 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 stop_monitor. 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.
stop_monitor is provided by the Js Reverse MCP server (1600822305/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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