quote_sell: friendly message when pool lacks WETH liquidity

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@qianexchange/mcp",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "MCP server for the Qian multichain DEX & launchpad (qian.ag) — launch and trade tokens from any MCP-capable agent",
   "type": "module",
   "bin": { "qian-mcp": "server.js" },

server.js

@@ -219,7 +219,14 @@ server.registerTool('quote_sell', {
   description: 'Preview selling a token for ETH via QianSwapRouter (1% router fee included). Read-only — no wallet, key, or approval needed. Returns expected ETH out.',
   inputSchema: { chain: chainSlug, address, token_amount: z.string().describe('Tokens to sell in whole tokens, e.g. "1000000"') },
 }, async ({ chain, address: addr, token_amount }) => {
-  const out = await quoteOut(chain, addr, 'sell', ethers.parseEther(token_amount))
+  let out
+  try {
+    out = await quoteOut(chain, addr, 'sell', ethers.parseEther(token_amount))
+  } catch (e) {
+    // Quoters revert when the pool can't cover the WETH out (thin/one-sided liquidity).
+    if (e?.code === 'CALL_EXCEPTION') throw new Error(`can't sell ${token_amount} tokens — the pool doesn't have enough WETH liquidity for a sell this size (try a smaller amount)`)
+    throw e
+  }
   return json({ token_in: token_amount, eth_out: ethers.formatEther(out) })
 })