java_heap_dump
AI agents call java_heap_dump to retrieve information from Heap Seance without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Heap dumps capture memory state but do not modify the target application's behavior or data—they are read operations for diagnostic purposes. However, severity is elevated to medium rather than low because heap dump extraction can: (1) pause or slow the target JVM, (2) consume significant disk/memory resources, and (3) potentially expose sensitive data within heap (passwords, keys, PII).
From the tool's definition Tool name 'java_heap_dump' and server purpose indicates memory analysis; heap dumps are diagnostic snapshots of Java memory state, typically read-only diagnostic operations.
Attacks that exploit this kind of access
java_heap_dump. It is categorised as a Read tool in the Heap Seance MCP Server, which means it retrieves data without modifying state.
Register the Heap Seance MCP server in PolicyLayer and add a rule for java_heap_dump: 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 Heap Seance. Nothing to install.
java_heap_dump 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 java_heap_dump 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 java_heap_dump. 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.
java_heap_dump is provided by the Heap Seance MCP server (segfaultsorcerer/heap-seance). 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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