d_set · Synapsis MCP: Risk & Policy

WHAT IT DOES

What d_set does on Synapsis

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

WHY IT NEEDS A POLICY

Why d_set needs a policy

The tool creates or registers a new file path entry in the system, which is a reversible write operation. It does not retrieve data (Read), execute arbitrary code (Execute), permanently destroy data (Destructive), or handle finances (Financial). The returned hash suggests persistent storage of the registration.

From the tool's definition Tool name 'd_set' and description 'Register file path. Returns hash.' indicates a write/registration operation that modifies state by recording a file path mapping.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

d_set Rate-limited

d_set 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": {
    "d_set": {
      "limits": [
        {
          "counter": "d_set_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 Synapsis, so you can run agents against it safely.

FAQ

Questions about d_set

What does the d_set tool do? +

Register file path. Returns hash. It is categorised as a Write tool in the Synapsis MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on d_set? +

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

What risk level is d_set? +

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

Can I rate-limit d_set? +

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

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

d_set is provided by the Synapsis MCP server (teamolimpo/synapsis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.