obsidian_write | PolicyLayer

WHAT IT DOES

What obsidian_write does on PM-MCP (Portfolio Management MCP Server)

AI agents use obsidian_write to create or update resources in PM-MCP (Portfolio Management MCP Server) — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PM-MCP (Portfolio Management MCP Server) environment.

WHY IT NEEDS A POLICY

Why obsidian_write needs a policy

Based on the name alone, this appears to be a Write operation that creates or modifies data (notes in Obsidian) reversibly. Without a description, confidence is moderate but not low because the name is clear.

From the tool's definition Tool named 'obsidian_write' with no description provided. The name indicates a write operation to Obsidian (a note-taking/knowledge management system). The 'write' verb combined with integration context suggests creating or modifying documents/notes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

obsidian_write Rate-limited

obsidian_write 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": {
    "obsidian_write": {
      "limits": [
        {
          "counter": "obsidian_write_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 PM-MCP (Portfolio Management MCP Server), so you can run agents against it safely.

FAQ

Questions about obsidian_write

What does the obsidian_write tool do? +

obsidian_write. It is categorised as a Write tool in the PM-MCP (Portfolio Management MCP Server) MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on obsidian_write? +

Register the PM-MCP (Portfolio Management MCP Server) MCP server in PolicyLayer and add a rule for obsidian_write: 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 PM-MCP (Portfolio Management MCP Server). Nothing to install.

What risk level is obsidian_write? +

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

Can I rate-limit obsidian_write? +

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

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

obsidian_write is provided by the PM-MCP (Portfolio Management MCP Server) MCP server (surplus96/pm-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.