[STEP 5b — FALLBACK] BLOCKING call — waits until ANY debugger pause occurs (breakpoint, debugger; statement, or exception). Before blocking, sends a notification to the user to trigger the page action. Must be called IMMEDIATELY after reloadPage() in the SAME AI turn — do NOT end your turn before...
Part of the Chrome Debugger MCP server.
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AI agents invoke waitForPause to trigger processes or run actions in Chrome Debugger MCP. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
waitForPause can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"waitForPause": {
"limits": [
{
"counter": "waitforpause_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Chrome Debugger MCP policy for all 18 tools.
These attack patterns abuse exactly the kind of access waitForPause gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
[STEP 5b — FALLBACK] BLOCKING call — waits until ANY debugger pause occurs (breakpoint, debugger; statement, or exception). Before blocking, sends a notification to the user to trigger the page action. Must be called IMMEDIATELY after reloadPage() in the SAME AI turn — do NOT end your turn before calling this. Prefer waitForSpecificPause when you know the exact file and line — it uses smarter two-tier matching. Use this only when the target location is unknown or when setBreakpoint is used without a specific line.. It is categorised as a Execute tool in the Chrome Debugger MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Chrome Debugger MCP server in PolicyLayer and add a rule for waitForPause: 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 Chrome Debugger MCP. Nothing to install.
waitForPause 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 waitForPause 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 waitForPause. 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.
waitForPause is provided by the Chrome Debugger MCP server (chrome-debugger-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 18 Chrome Debugger MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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