forget_weak_memories
Bulk-delete memories that fell below a decay threshold. Unlike forget_memory (content match) or archive_entities (criteria-based move), this uses decay-based importance scoring.
This record as markdown: /tools/danielsimonjr-memory-mcp/forget-weak-memories.md
What forget_weak_memories does on Enhanced Knowledge Graph Memory Server
AI agents call forget_weak_memories to permanently remove resources in Enhanced Knowledge Graph Memory Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why forget_weak_memories is rated Critical
This tool permanently removes data (memories) from the knowledge graph storage based on a decay threshold, with no undo mechanism described. Bulk deletion of stored data qualifies as Destructive rather than Write, as the operation cannot be reversed. The 'high' severity reflects that an agent misusing decay thresholds could irreversibly lose significant portions of stored knowledge.
From the tool's definition Bulk-delete memories that fell below a decay threshold. The tool uses the verb 'delete' and is described as bulk-deleting memories, which is irreversible data removal.
Attacks that exploit this kind of access
The rule that runs forget_weak_memories safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Enhanced Knowledge Graph Memory Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For forget_weak_memories, this is the rule to start with:
forget_weak_memories is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Enhanced Knowledge Graph Memory Server, apply this rule, and every forget_weak_memories call is checked against it from then on.
Questions about forget_weak_memories
Bulk-delete memories that fell below a decay threshold. Unlike forget_memory (content match) or archive_entities (criteria-based move), this uses decay-based importance scoring. It is categorised as a Destructive tool in the Enhanced Knowledge Graph Memory Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Enhanced Knowledge Graph Memory Server MCP server in PolicyLayer and add a rule for forget_weak_memories: 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 Enhanced Knowledge Graph Memory Server. Nothing to install.
forget_weak_memories is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the forget_weak_memories 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 forget_weak_memories. 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.
forget_weak_memories is provided by the Enhanced Knowledge Graph Memory Server MCP server (danielsimonjr/memory-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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