Delete a note from the Obsidian vault
AI agents call delete_note to permanently remove resources in Obsidian MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deletion of notes is an irreversible action that cannot be undone through the tool itself. While not financial in impact, it represents permanent data loss from a user's personal knowledge base. This falls clearly into the Destructive category as the primary function is to irreversibly remove data.
From the tool's definition The tool is explicitly named 'delete_note' with description 'Delete a note from the Obsidian vault'. The verb 'delete' indicates irreversible removal of data.
Attacks that exploit this kind of access
Delete a note from the Obsidian vault. It is categorised as a Destructive tool in the Obsidian MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Obsidian MCP Server MCP server in PolicyLayer and add a rule for delete_note: 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 MCP Server. Nothing to install.
delete_note 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_note 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_note. 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_note is provided by the Obsidian MCP Server MCP server (markheramis/obsidian-mcp). 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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