synthesis_from_examples · Musubix MCP: Risk & Policy

WHAT IT DOES

What synthesis_from_examples does on Musubix

AI agents invoke synthesis_from_examples to trigger actions in Musubix. 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 synthesis_from_examples needs a policy

This tool generates and likely executes or produces executable code/programs from examples. Synthesizing a program is an Execute-class action because it produces runnable code whose effects depend on the provided examples. Misuse could result in generation of unintended or malicious programs.

From the tool's definition 'Synthesize a program from input/output examples using Programming by Example (PBE)'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

synthesis_from_examples Rate-limited

synthesis_from_examples 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": {
    "synthesis_from_examples": {
      "limits": [
        {
          "counter": "synthesis_from_examples_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 Musubix, so you can run agents against it safely.

FAQ

Questions about synthesis_from_examples

What does the synthesis_from_examples tool do? +

Synthesize a program from input/output examples using Programming by Example (PBE). It is categorised as a Execute tool in the Musubix MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on synthesis_from_examples? +

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

What risk level is synthesis_from_examples? +

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

Can I rate-limit synthesis_from_examples? +

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

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

synthesis_from_examples is provided by the Musubix MCP server (@nahisaho/musubix-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.