check_sat · Z3/SMT MCP Server MCP: Risk & Policy

WHAT IT DOES

What check_sat does on Z3/SMT MCP Server

AI agents invoke check_sat to trigger actions in Z3/SMT 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 check_sat needs a policy

Based on the server context (Z3 theorem prover) and sibling tools like 'solve', 'prove', 'session_check', this tool almost certainly performs a satisfiability check — running the Z3 solver engine against a set of constraints. This is an Execute-category action (triggering external computation), though it has no side effects on persistent data.

From the tool's definition Tool name 'check_sat' on a Z3/SMT server; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

check_sat Rate-limited

check_sat 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": {
    "check_sat": {
      "limits": [
        {
          "counter": "check_sat_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 Z3/SMT MCP Server, so you can run agents against it safely.

FAQ

Questions about check_sat

What does the check_sat tool do? +

check_sat. It is categorised as a Execute tool in the Z3/SMT 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 check_sat? +

Register the Z3/SMT MCP Server MCP server in PolicyLayer and add a rule for check_sat: 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 Z3/SMT MCP Server. Nothing to install.

What risk level is check_sat? +

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

Can I rate-limit check_sat? +

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

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

check_sat is provided by the Z3/SMT MCP Server MCP server (newjerseystyle/z3smt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.