Loads a memory heapsnapshot and returns instances of a specific class with their IDs.
AI agents call get_heapsnapshot_class_nodes to retrieve information from Chrome Devtools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads and inspects memory state from a Chrome DevTools heapsnapshot, which is diagnostic/introspection functionality. It retrieves instances of a class and their IDs without creating, modifying, deleting, or executing operations. While it operates within a Chrome automation context, the specific action here is data retrieval for memory analysis, with no side effects on the application or system.
From the tool's definition Tool description states 'Loads a memory heapsnapshot and returns instances' - this is a retrieval operation that queries and returns data about heap memory state without modifying anything.
Attacks that exploit this kind of access
Loads a memory heapsnapshot and returns instances of a specific class with their IDs. It is categorised as a Read tool in the Chrome Devtools MCP Server, which means it retrieves data without modifying state.
Register the Chrome Devtools MCP server in PolicyLayer and add a rule for get_heapsnapshot_class_nodes: 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 Devtools. Nothing to install.
get_heapsnapshot_class_nodes 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 get_heapsnapshot_class_nodes 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 get_heapsnapshot_class_nodes. 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.
get_heapsnapshot_class_nodes is provided by the Chrome Devtools MCP server (zhang77-x/chrpme_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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