Take a heap snapshot and return a summary with top memory retainers. This may take a few seconds.
AI agents call take_heap_snapshot to retrieve information from Mcp Rn Devtools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
A heap snapshot is a diagnostic operation that reads and analyzes memory state to identify memory usage patterns and top memory consumers. It produces a report summary but does not execute code, modify application state, delete data, or trigger financial transactions.
From the tool's definition Tool name 'take_heap_snapshot' and description 'Take a heap snapshot and return a summary with top memory retainers' indicate data retrieval and inspection of memory state without modification or side effects.
Attacks that exploit this kind of access
Take a heap snapshot and return a summary with top memory retainers. This may take a few seconds. It is categorised as a Read tool in the Mcp Rn Devtools MCP Server, which means it retrieves data without modifying state.
Register the Mcp Rn Devtools MCP server in PolicyLayer and add a rule for take_heap_snapshot: 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 Mcp Rn Devtools. Nothing to install.
take_heap_snapshot 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 take_heap_snapshot 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 take_heap_snapshot. 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.
take_heap_snapshot is provided by the Mcp Rn Devtools MCP server (pablonortiz/mcp-rn-devtools). 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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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