gt_wasm_parse_formula · Claude Flow MCP: Risk & Policy

WHAT IT DOES

What gt_wasm_parse_formula does on Claude Flow

AI agents invoke gt_wasm_parse_formula to trigger actions in Claude Flow. 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 gt_wasm_parse_formula needs a policy

Parsing user-supplied formula content via WASM is an Execute operation: it processes and evaluates structured input whose effects depend on the content being parsed. While the tool itself appears to be a parser (which might seem like Read), WASM execution of arbitrary formulas with AST generation crosses into Execute territory, as malicious or uncontrolled formula content could trigger unintended operations.

From the tool's definition Tool uses WASM to parse and process arbitrary formula content into AST. WASM execution can trigger external operations and code evaluation depending on formula semantics.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gt_wasm_parse_formula Rate-limited

gt_wasm_parse_formula 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": {
    "gt_wasm_parse_formula": {
      "limits": [
        {
          "counter": "gt_wasm_parse_formula_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 Claude Flow, so you can run agents against it safely.

FAQ

Questions about gt_wasm_parse_formula

What does the gt_wasm_parse_formula tool do? +

Parse TOML formula content to AST using WASM (352x faster than JavaScript). It is categorised as a Execute tool in the Claude Flow MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on gt_wasm_parse_formula? +

Register the Claude Flow MCP server in PolicyLayer and add a rule for gt_wasm_parse_formula: 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 Claude Flow. Nothing to install.

What risk level is gt_wasm_parse_formula? +

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

Can I rate-limit gt_wasm_parse_formula? +

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

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

gt_wasm_parse_formula is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.