gsd_add_phase · Gsd MCP: Risk & Policy

WHAT IT DOES

What gsd_add_phase does on Gsd

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

WHY IT NEEDS A POLICY

Why gsd_add_phase needs a policy

The tool adds/creates a new phase to a milestone, which constitutes writing or creating data in the project state. It modifies project structure but does not execute arbitrary code, delete data irreversibly, or move money. It is reversible via deletion or undo, so it ranks below Destructive.

From the tool's definition 'Add new phase to end of current milestone' — creates a new phase entity in the GSD project state, modifying the milestone structure. This is a CREATE operation with reversible effects (a phase can be removed or modified later).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gsd_add_phase Rate-limited

gsd_add_phase 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": {
    "gsd_add_phase": {
      "limits": [
        {
          "counter": "gsd_add_phase_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 Gsd, so you can run agents against it safely.

FAQ

Questions about gsd_add_phase

What does the gsd_add_phase tool do? +

Add new phase to end of current milestone. It is categorised as a Write tool in the Gsd MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gsd_add_phase? +

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

What risk level is gsd_add_phase? +

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

Can I rate-limit gsd_add_phase? +

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

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

gsd_add_phase is provided by the Gsd MCP server (m0-ar/gsd-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.