1 files changed, 100 insertions, 0 deletions
diff --git a/scripts/test-claude-mcp-without-builtin-tools.sh b/scripts/test-claude-mcp-without-builtin-tools.sh
new file mode 100755
index 0000000..9affc3e
--- /dev/null
+++ b/scripts/test-claude-mcp-without-builtin-tools.sh
@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+tmp="$(mktemp -d)"
+trap 'rm -rf "$tmp"' EXIT
+cd "$tmp"
+
+cat > mcp.json <<'JSON'
+{
+  "mcpServers": {
+    "panto-test": {
+      "command": "node",
+      "args": ["server.js"]
+    }
+  }
+}
+JSON
+
+cat > server.js <<'JS'
+#!/usr/bin/env node
+const readline = require("readline");
+const rl = readline.createInterface({ input: process.stdin });
+
+function send(message) {
+  process.stdout.write(JSON.stringify(message) + "\n");
+}
+
+rl.on("line", (line) => {
+  let message;
+  try {
+    message = JSON.parse(line);
+  } catch {
+    return;
+  }
+
+  if (message.method === "initialize") {
+    send({
+      jsonrpc: "2.0",
+      id: message.id,
+      result: {
+        protocolVersion: "2024-11-05",
+        capabilities: { tools: {} },
+        serverInfo: { name: "panto-test", version: "0.0.1" }
+      }
+    });
+  } else if (message.method === "notifications/initialized") {
+    // No response for notifications.
+  } else if (message.method === "tools/list") {
+    send({
+      jsonrpc: "2.0",
+      id: message.id,
+      result: {
+        tools: [
+          {
+            name: "ping",
+            description: "Return pong-from-mcp",
+            inputSchema: {
+              type: "object",
+              properties: {},
+              additionalProperties: false
+            }
+          }
+        ]
+      }
+    });
+  } else if (message.method === "tools/call") {
+    send({
+      jsonrpc: "2.0",
+      id: message.id,
+      result: {
+        content: [{ type: "text", text: "pong-from-mcp" }]
+      }
+    });
+  } else if (message.id !== undefined) {
+    send({ jsonrpc: "2.0", id: message.id, result: {} });
+  }
+});
+JS
+chmod +x server.js
+
+cat >&2 <<'EOF'
+Starting Claude with built-in tools disabled and one MCP tool enabled.
+
+Manual test prompt:
+  call the ping MCP tool
+
+Expected useful result:
+  pong-from-mcp
+
+If Claude says no tools are available, --tools "" also disables MCP tools.
+EOF
+
+unset ANTHROPIC_API_KEY
+exec claude \
+  --tools "" \
+  --strict-mcp-config \
+  --mcp-config mcp.json \
+  --disable-slash-commands \
+  --no-chrome \
+  --system-prompt 'If tool mcp__panto-test__ping exists, call it when asked. Otherwise say unavailable.'