highlight_create · Raindrop Io MCP Server MCP: Risk & Policy

WHAT IT DOES

What highlight_create does on Raindrop Io MCP Server

AI agents use highlight_create to create or update resources in Raindrop Io MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Raindrop Io MCP Server environment.

WHY IT NEEDS A POLICY

Why highlight_create needs a policy

This tool creates new highlights attached to bookmarks, which is a write operation that adds data to the Raindrop.io system. It does not execute external code, delete data irreversibly, move money, or have destructive side effects. The blast radius is minimal—at worst, unwanted highlights are added to bookmarks and can be removed.

From the tool's definition Tool name 'highlight_create' and description 'Create a new text highlight' indicate creation of new data. The action is reversible (highlights can be deleted) and represents a non-destructive modification to bookmark metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

highlight_create Rate-limited

highlight_create 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": {
    "highlight_create": {
      "limits": [
        {
          "counter": "highlight_create_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 Raindrop Io MCP Server, so you can run agents against it safely.

FAQ

Questions about highlight_create

What does the highlight_create tool do? +

Create a new text highlight for a bookmark. Use this to save important text passages from articles or documents. It is categorised as a Write tool in the Raindrop Io 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 highlight_create? +

Register the Raindrop Io MCP Server MCP server in PolicyLayer and add a rule for highlight_create: 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 Raindrop Io MCP Server. Nothing to install.

What risk level is highlight_create? +

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

Can I rate-limit highlight_create? +

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

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

highlight_create is provided by the Raindrop Io MCP Server MCP server (kazuph/mcp-raindrop). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.