gdb_memory · Gdb MCP: Risk & Policy

WHAT IT DOES

What gdb_memory does on Gdb

AI agents invoke gdb_memory 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_memory needs a policy

Although it includes read/search/dump capabilities, the tool explicitly supports writing and block-writing to inferior (debugged process) memory. Writing arbitrary data into a running process's memory is a powerful side-effecting operation that can alter program behavior, bypass security checks, or corrupt state — making Execute (or Write at minimum) the appropriate category.

From the tool's definition 'Read, write, block-write, search, or dump inferior memory' — the tool can write and block-write to process memory, not just read it.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gdb_memory Rate-limited

gdb_memory 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_memory": {
      "limits": [
        {
          "counter": "gdb_memory_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_memory

What does the gdb_memory tool do? +

Read, write, block-write, search, or dump inferior memory. 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_memory? +

Register the Gdb MCP server in PolicyLayer and add a rule for gdb_memory: 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_memory? +

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

Can I rate-limit gdb_memory? +

Yes. Add a rate_limit block to the gdb_memory 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_memory completely? +

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

gdb_memory 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.