service_worker_dispatch_sync
Dispatch a Background Sync event to a service worker via CDP ServiceWorker.dispatchSyncEvent. Requires an attached CDP session on a SW target.
This record as markdown: /tools/io-github-vmoranv-jshookmcp/service-worker-dispatch-sync.md
What service_worker_dispatch_sync does on Jshookmcp
AI agents invoke service_worker_dispatch_sync to trigger actions in Jshookmcp. 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 service_worker_dispatch_sync is rated High
Triggers external service worker operations whose effects depend on the sync event dispatched.
From the tool's definition Dispatch a Background Sync event to a service worker via CDP
Attacks that exploit this kind of access
The rule that runs service_worker_dispatch_sync safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Jshookmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For service_worker_dispatch_sync, this is the rule to start with:
service_worker_dispatch_sync 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 Jshookmcp, apply this rule, and every service_worker_dispatch_sync call is checked against it from then on.
Questions about service_worker_dispatch_sync
Dispatch a Background Sync event to a service worker via CDP ServiceWorker.dispatchSyncEvent. Requires an attached CDP session on a SW target. It is categorised as a Execute tool in the Jshookmcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Jshook MCP server in PolicyLayer and add a rule for service_worker_dispatch_sync: 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 Jshookmcp. Nothing to install.
service_worker_dispatch_sync 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 service_worker_dispatch_sync 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 service_worker_dispatch_sync. 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.
service_worker_dispatch_sync is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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