imhex_bookmark_add

THE RISK

Medium Risk

Why imhex_bookmark_add needs a policy

Adding a bookmark is a reversible write operation that creates or modifies metadata within the ImHex application state. It does not read sensitive data, execute arbitrary code, delete anything, or move money. Bookmarks are user annotations and can be removed, making this a harmless Write action with minimal blast radius.

From the tool's definition Tool name 'imhex_bookmark_add' and description 'Add a bookmark to a specific location in the file' indicate creation of a new bookmark record/marker.

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

POLICY

How to control imhex_bookmark_add

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

policy.json

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

imhex_bookmark_add 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 ImHex MCP Integration — 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 →

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EXPLORE

Related tools and policies

More ImHex MCP Integration tools

Destructive imhex_remove_bookmark Remove a bookmark by its ID Execute imhex_open_file Open a file in ImHex for analysis Write imhex_close_file Close a specific file/provider in ImHex Write imhex_export_data Export a region of data to a file in various formats (binary, hex, or base64) Write imhex_export_search_results Export search results to CSV or JSON format with optional context bytes Write imhex_set_pattern_code Set pattern language code in ImHex for binary data parsing Write imhex_switch_file Switch the active file/provider in ImHex Write imhex_write_hex Write hex data to the currently open file

All 27 ImHex MCP Integration tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

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 imhex_bookmark_add

What does the imhex_bookmark_add tool do? +

Add a bookmark to a specific location in the file. It is categorised as a Write tool in the ImHex MCP Integration MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on imhex_bookmark_add? +

Register the ImHex MCP Integration MCP server in PolicyLayer and add a rule for imhex_bookmark_add: 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 ImHex MCP Integration. Nothing to install.

What risk level is imhex_bookmark_add? +

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

Can I rate-limit imhex_bookmark_add? +

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

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

imhex_bookmark_add is provided by the ImHex MCP Integration MCP server (jmpnop/imhexmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ImHex MCP Integration tool call.

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

CHECK YOUR STACK →