gdb_register · Gdb MCP: Risk & Policy

WHAT IT DOES

What gdb_register does on Gdb

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

WHY IT NEEDS A POLICY

Why gdb_register needs a policy

The tool spans Read and Write. Writing registers in a debugged process can alter execution flow, corrupt state, or be used to hijack control flow (e.g., overwrite instruction pointer). Per the rules, Write is chosen over Read as the more severe applicable category.

From the tool's definition 'Read all registers, read one register, or write one register' — the write capability allows modifying CPU register values in a running/attached process

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gdb_register Rate-limited

gdb_register 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": {
    "gdb_register": {
      "limits": [
        {
          "counter": "gdb_register_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 Gdb, so you can run agents against it safely.

FAQ

Questions about gdb_register

What does the gdb_register tool do? +

Read all registers, read one register, or write one register. It is categorised as a Write tool in the Gdb MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gdb_register? +

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

What risk level is gdb_register? +

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

Can I rate-limit gdb_register? +

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

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

gdb_register is provided by the Gdb MCP server (traver88/gdb-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.