AI agents invoke stop_electron_main_heap_sampling to trigger actions in Electron. 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.
This tool executes a diagnostic command against a running process that modifies its state (stopping heap sampling). While not destructive or immediately harmful, it is an Execute-class action because it triggers external operations on the Electron main process whose effects depend on the process state.
From the tool's definition "Stop heap sampling and return profile" performs a heap sampling operation on the Electron main process. This is a profiling/diagnostic action that triggers code execution within the main process to halt an active sampling session and retrieve memory…
Attacks that exploit this kind of access
Stop heap sampling and return profile. It is categorised as a Execute tool in the Electron MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Electron MCP server in PolicyLayer and add a rule for stop_electron_main_heap_sampling: 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 Electron. Nothing to install.
stop_electron_main_heap_sampling 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_electron_main_heap_sampling 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_electron_main_heap_sampling. 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_electron_main_heap_sampling is provided by the Electron MCP server (ohah/electron-mcp-server). 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.
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