set_bookmark

THE RISK

Medium Risk

Why set_bookmark needs a policy

This tool creates bookmarks—metadata artifacts that annotate binary analysis results. Bookmarks are non-destructive, reversible metadata (comments can be deleted or modified), and have no side effects on the actual binary or system. It is clearly a Write operation rather than Execute or Destructive.

From the tool's definition Tool name is 'set_bookmark' and description states 'Create a bookmark at an address with a category and comment.' The verb 'Create' combined with storing metadata (bookmark, category, comment) indicates a write operation that creates reversible annotations.

Documented attack patterns abuse exactly the kind of access set_bookmark gives an agent:

POLICY

How to control set_bookmark

PolicyLayer is an MCP gateway — it sits between your AI agents and Kawaiidra MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for set_bookmark:

policy.json

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

set_bookmark 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.

Create a free account and register Kawaiidra MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about set_bookmark

What does the set_bookmark tool do? +

Create a bookmark at an address with a category and comment. It is categorised as a Write tool in the Kawaiidra MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_bookmark? +

Register the Kawaiidra MCP server in PolicyLayer and add a rule for set_bookmark: 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 Kawaiidra MCP. Nothing to install.

What risk level is set_bookmark? +

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

Can I rate-limit set_bookmark? +

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

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

set_bookmark is provided by the Kawaiidra MCP server (wagonbomb/kawaiidra-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Kawaiidra MCP tool call.

Start from Kawaiidra MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →