sdd_generate_user_stories

THE RISK

Medium Risk

Why sdd_generate_user_stories needs a policy

The tool creates new structured outputs (user stories with acceptance criteria and diagrams) based on input specifications. This is a write operation as it produces and persists new data artifacts within the spec-driven development pipeline.

From the tool's definition Generates user stories with acceptance criteria and flow diagrams from SPECIFICATION.md - this is content creation/generation that modifies or produces new artifacts in the specification system.

Documented attack patterns abuse exactly the kind of access sdd_generate_user_stories gives an agent:

POLICY

How to control sdd_generate_user_stories

PolicyLayer is an MCP gateway — it sits between your AI agents and Specky, and nothing reaches the server without passing your rules. This is the rule we recommend for sdd_generate_user_stories:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sdd_generate_user_stories": {
      "limits": [
        {
          "counter": "sdd_generate_user_stories_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

sdd_generate_user_stories 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.

Create a free account and register Specky — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about sdd_generate_user_stories

What does the sdd_generate_user_stories tool do? +

Generates user stories with acceptance criteria and flow diagrams from SPECIFICATION.md. Each story includes a Mermaid flowchart of the user journey. It is categorised as a Write tool in the Specky MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sdd_generate_user_stories? +

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

What risk level is sdd_generate_user_stories? +

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

Can I rate-limit sdd_generate_user_stories? +

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

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

sdd_generate_user_stories is provided by the Specky MCP server (paulasilvatech/specky). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Specky tool call.

Start from Specky, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →