delete_episode
Delete an episode from the graph memory.
This record as markdown: /tools/aegntic-aegntic-mcp/delete-episode.md
What delete_episode does on Obsidian Elite RAG MCP Server
AI agents call delete_episode to permanently remove resources in Obsidian Elite RAG MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why delete_episode is rated Critical
This tool permanently removes data from the knowledge graph without reversibility. Although the blast radius is constrained to a single episode rather than bulk deletion, unauthorized or erroneous deletion of personal notes or knowledge entries in an RAG system represents a high-severity impact. The tool cannot be undone, making it destructive rather than merely a write operation.
From the tool's definition delete_episode: 'Delete an episode from the graph memory.' The verb 'Delete' combined with irreversible removal from persistent storage (graph memory) categorizes this as destructive. No undo mechanism is implied.
Attacks that exploit this kind of access
The rule that runs delete_episode safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Obsidian Elite RAG MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For delete_episode, this is the rule to start with:
delete_episode 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 Obsidian Elite RAG MCP Server, apply this rule, and every delete_episode call is checked against it from then on.
Questions about delete_episode
Delete an episode from the graph memory. It is categorised as a Destructive tool in the Obsidian Elite RAG MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Obsidian Elite RAG MCP Server MCP server in PolicyLayer and add a rule for delete_episode: 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 Obsidian Elite RAG MCP Server. Nothing to install.
delete_episode 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 delete_episode 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 delete_episode. 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.
delete_episode is provided by the Obsidian Elite RAG MCP Server MCP server (aegntic/aegntic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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