update_note_section · Graph Rag Obsidian MCP: Risk & Policy

WHAT IT DOES

What update_note_section does on Graph Rag Obsidian

AI agents use update_note_section 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 update_note_section needs a policy

The tool performs a reversible write operation on note data—updating a section within an existing note. While the description is empty, the naming convention combined with the server's purpose (managing an Obsidian vault) and sibling write-oriented tools ('add_content_to_note', 'create_note') strongly indicates data modification capabilities.

From the tool's definition Tool name 'update_note_section' indicates modification of note content within the Obsidian vault. Sibling tools include 'add_content_to_note' and 'create_note', establishing this as part of a content modification API.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_note_section Rate-limited

update_note_section 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": {
    "update_note_section": {
      "limits": [
        {
          "counter": "update_note_section_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 update_note_section

What does the update_note_section tool do? +

update_note_section. 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 update_note_section? +

Register the Graph Rag Obsidian MCP server in PolicyLayer and add a rule for update_note_section: 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 update_note_section? +

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

Can I rate-limit update_note_section? +

Yes. Add a rate_limit block to the update_note_section 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 update_note_section completely? +

Set action: deny in the PolicyLayer policy for update_note_section. 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 update_note_section? +

update_note_section 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.