# delete_relation

Delete a relation from the knowledge graph

Agent View of the PolicyLayer registry record for `delete_relation`. HTML page: https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/delete-relation

## Facts

- Tool: `delete_relation`
- Server: Daniel LightRAG MCP Server (`desimpkins/daniel-lightrag-mcp`) — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp.md
- Homepage: https://github.com/desimpkins/daniel-lightrag-mcp
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "delete_relation",
    "arguments": {}
  }
}
```

## Why delete_relation is rated Critical

This tool permanently removes relational data from the knowledge graph. Deletion operations are irreversible and represent the most severe category of potential misuse. An AI agent with access to this tool could maliciously or accidentally sever important relationships in the knowledge graph, corrupting data integrity.

From the tool's own definition: "Tool name 'delete_relation' combined with description 'Delete a relation from the knowledge graph' explicitly indicates irreversible deletion of data. The action 'Delete' is a destructive operation that cannot be undone."

## Use case

AI agents call delete_relation to permanently remove resources in Daniel LightRAG MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

## Recommended policy (PolicyLayer)

Verdict: **Hidden**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Daniel LightRAG MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_relation"
  ]
}
```

## Other tools on Daniel LightRAG MCP Server (20)

- `delete_document` — Destructive — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/delete-document.md
- `delete_entity` — Destructive — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/delete-entity.md
- `check_entity_exists` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/check-entity-exists.md
- `get_document_status_counts` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-document-status-counts.md
- `get_documents` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-documents.md
- `get_documents_paginated` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-documents-paginated.md
- `get_graph_labels` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-graph-labels.md
- `get_health` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-health.md
- `get_knowledge_graph` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-knowledge-graph.md
- `get_pipeline_status` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-pipeline-status.md
- `get_track_status` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/get-track-status.md
- `hello` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/hello.md
- `query_text` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/query-text.md
- `query_text_stream` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/query-text-stream.md
- `scan_documents` — Read — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/scan-documents.md
- `insert_text` — Write — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/insert-text.md
- `insert_texts` — Write — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/insert-texts.md
- `update_entity` — Write — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/update-entity.md
- `update_relation` — Write — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/update-relation.md
- `upload_document` — Write — https://policylayer.com/tools/desimpkins-daniel-lightrag-mcp/upload-document.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=desimpkins-daniel-lightrag-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/desimpkins-daniel-lightrag-mcp