gsd_insert_phase · Gsd MCP: Risk & Policy

WHAT IT DOES

What gsd_insert_phase does on Gsd

AI agents use gsd_insert_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_insert_phase needs a policy

The tool modifies project structure by inserting a new phase, which aligns with Write category (creates or modifies data reversibly). Not destructive since phases can be removed; not Execute since it doesn't run code or trigger external operations—it organizes workflow phases. Medium severity because inserting misplaced phases could disrupt project workflow, but the effect is recoverable.

From the tool's definition Tool description states 'Insert urgent work as decimal phase between existing phases', indicating it creates/adds a new phase element to the project structure. This is a reversible modification of project state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gsd_insert_phase Rate-limited

gsd_insert_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_insert_phase": {
      "limits": [
        {
          "counter": "gsd_insert_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_insert_phase

What does the gsd_insert_phase tool do? +

Insert urgent work as decimal phase between existing phases. 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_insert_phase? +

Register the Gsd MCP server in PolicyLayer and add a rule for gsd_insert_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_insert_phase? +

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

Can I rate-limit gsd_insert_phase? +

Yes. Add a rate_limit block to the gsd_insert_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_insert_phase completely? +

Set action: deny in the PolicyLayer policy for gsd_insert_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_insert_phase? +

gsd_insert_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.