gdb_session · Gdb MCP: Risk & Policy

WHAT IT DOES

What gdb_session does on Gdb

AI agents invoke gdb_session to trigger actions in Gdb. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why gdb_session needs a policy

This tool enables initiation and control of a debugger session, which can attach to, pause, resume, and manipulate running processes. While inspection is read-only, the ability to start/stop/restart sessions makes this Execute-class: it triggers external operations whose effects depend on what process is being debugged and how the session is used.

From the tool's definition The tool 'Start, stop, restart, or inspect the current GDB session' directly controls the GDB debugger, which is a command execution and program control interface.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gdb_session Rate-limited

gdb_session stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_session": {
      "limits": [
        {
          "counter": "gdb_session_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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_session

What does the gdb_session tool do? +

Start, stop, restart, or inspect the current GDB session. It is categorised as a Execute tool in the Gdb MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on gdb_session? +

Register the Gdb MCP server in PolicyLayer and add a rule for gdb_session: 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_session? +

gdb_session is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit gdb_session? +

Yes. Add a rate_limit block to the gdb_session 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_session completely? +

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

gdb_session 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.