add_content_to_note · Graph Rag Obsidian MCP: Risk & Policy

WHAT IT DOES

What add_content_to_note does on Graph Rag Obsidian

AI agents use add_content_to_note to create or update resources in Graph Rag Obsidian — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Graph Rag Obsidian environment.

WHY IT NEEDS A POLICY

Why add_content_to_note needs a policy

This tool creates or modifies data reversibly by appending/adding content to notes. The action is not destructive (content is not deleted), not financial, and does not execute arbitrary code or queries. It fits the Write category: creates or modifies data reversibly.

From the tool's definition Tool description states 'Add content to an existing note' — a modification operation on data within the Obsidian vault.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_content_to_note Rate-limited

add_content_to_note stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_content_to_note": {
      "limits": [
        {
          "counter": "add_content_to_note_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Graph Rag Obsidian, so you can run agents against it safely.

FAQ

Questions about add_content_to_note

What does the add_content_to_note tool do? +

Add content to an existing note. It is categorised as a Write tool in the Graph Rag Obsidian MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_content_to_note? +

Register the Graph Rag Obsidian MCP server in PolicyLayer and add a rule for add_content_to_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 Graph Rag Obsidian. Nothing to install.

What risk level is add_content_to_note? +

add_content_to_note is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_content_to_note? +

Yes. Add a rate_limit block to the add_content_to_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.

How do I block add_content_to_note completely? +

Set action: deny in the PolicyLayer policy for add_content_to_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.

What MCP server provides add_content_to_note? +

add_content_to_note is provided by the Graph Rag Obsidian MCP server (nickshffer/graph-rag-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.