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MCP Tool Tester

Fetch or paste an MCP tool schema, validate a JSON-RPC tools/call payload, and send results to Evals.

tool-call.json

{
  "jsonrpc": "2.0",
  "id": "sandbox-tool-test",
  "method": "tools/call",
  "params": {
    "name": "get_health",
    "arguments": {}
  }
}