resume_all · Syncthing MCP Server MCP: Risk & Policy

WHAT IT DOES

What resume_all does on Syncthing MCP Server

AI agents invoke resume_all to trigger actions in Syncthing MCP Server. 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 resume_all needs a policy

This tool triggers an external operation (resuming synchronization) across all folders/devices on a Syncthing instance. It doesn't merely read data, nor does it create/modify data directly, nor is it irreversible destruction. It initiates a system-wide operational state change that causes Syncthing to begin actively syncing files, which could have broad side effects depending on pending changes.

From the tool's definition Resume all syncing on the instance

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

resume_all Rate-limited

resume_all 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": {
    "resume_all": {
      "limits": [
        {
          "counter": "resume_all_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 Syncthing MCP Server, so you can run agents against it safely.

FAQ

Questions about resume_all

What does the resume_all tool do? +

Resume all syncing on the instance. It is categorised as a Execute tool in the Syncthing MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on resume_all? +

Register the Syncthing MCP Server MCP server in PolicyLayer and add a rule for resume_all: 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 Syncthing MCP Server. Nothing to install.

What risk level is resume_all? +

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

Can I rate-limit resume_all? +

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

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

resume_all is provided by the Syncthing MCP Server MCP server (zaphodsdad/syncthing-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.