diff --git a/.github/actions/generate-mcp-tools/generate-tools.mjs b/.github/actions/generate-mcp-tools/generate-tools.mjs
index 18f98c1..3ada6d3 100644
--- a/.github/actions/generate-mcp-tools/generate-tools.mjs
+++ b/.github/actions/generate-mcp-tools/generate-tools.mjs
@@ -440,7 +440,7 @@ function renderSchema(jsonSchema) {
 		const type = Array.isArray(prop.type)
 			? prop.type.join(" | ")
 			: (prop.type ?? "unknown");
-		const requiredStr = required.has(key) ? "✅" : "";
+		const requiredStr = required.has(key) ? "true" : "false";
 		const description = prop.description ?? "";
 		const defaultVal = prop.default !== undefined ? String(prop.default) : "";
 
diff --git a/README.md b/README.md
index 92a6da7..13e0a90 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ Add the following configuration to your MCP client settings (e.g., `claude_deskt
       "args": ["-y", "@iqai/mcp-polymarket"],
       "env": {
         "POLYMARKET_PRIVATE_KEY": "your_private_key_here",
-        "POLYMARKET_RPC_URL": "https://polygon-mainnet.g.alchemy.com/v2/<YOUR_KEY>"
+        "POLYGON_RPC_URL": "https://polygon-mainnet.g.alchemy.com/v2/<YOUR_KEY>"
       }
     }
   }
@@ -75,7 +75,7 @@ Add the following configuration to your MCP client settings (e.g., `claude_deskt
 | Variable | Required | Description | Default |
 | :--- | :--- | :--- | :--- |
 | `POLYMARKET_PRIVATE_KEY` | No | Private key for trading (enables trading tools) | - |
-| `POLYMARKET_RPC_URL` | No | Polygon RPC URL for transactions | `https://polygon-rpc.com` |
+| `POLYGON_RPC_URL` | No | Polygon RPC URL for transactions | `https://polygon-rpc.com` |
 | `CLOB_API_BASE` | No | Polymarket CLOB API base URL | `https://clob.polymarket.com` |
 | `CHAIN_ID` | No | Blockchain network chain ID | `137` (Polygon) |
 | `SIGNATURE_TYPE` | No | Signature type for signing transactions | `2` |
diff --git a/package-lock.json b/package-lock.json
index 5a45357..4f852c5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,15 @@
 {
 	"name": "@iqai/mcp-polymarket",
-	"version": "0.0.4",
+	"version": "0.0.16",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@iqai/mcp-polymarket",
-			"version": "0.0.4",
+			"version": "0.0.16",
 			"license": "MIT",
 			"dependencies": {
-				"@hk/polymarket": "npm:@jsr/hk__polymarket@^0.2.1",
+				"@jsr/hk__polymarket": "^0.2.1",
 				"@modelcontextprotocol/sdk": "^1.20.2",
 				"@polymarket/clob-client": "^4.22.8",
 				"ethers": "^5.8.0",
@@ -25,7 +25,8 @@
 				"@changesets/cli": "^2.29.7",
 				"@types/node": "^24.9.1",
 				"tsx": "^4.20.6",
-				"typescript": "^5.9.3"
+				"typescript": "^5.9.3",
+				"zod-to-json-schema": "^3.25.1"
 			}
 		},
 		"node_modules/@babel/runtime": {
@@ -1704,23 +1705,6 @@
 				"@ethersproject/strings": "^5.8.0"
 			}
 		},
-		"node_modules/@hk/polymarket": {
-			"name": "@jsr/hk__polymarket",
-			"version": "0.2.1",
-			"resolved": "https://npm.jsr.io/~/11/@jsr/hk__polymarket/0.2.1.tgz",
-			"integrity": "sha512-rK4IbprOl9ApPOHnai7Ajz8NYesD+PfZK54244oAXlgFvUW906MioQoMBQSpSMgc6dWOTIGgPBfKByWoUy0NoA==",
-			"dependencies": {
-				"@elysiajs/cors": "^1.3.3",
-				"@elysiajs/eden": "^1.3.2",
-				"@elysiajs/openapi": "^1.3.7",
-				"@elysiajs/swagger": "^1.3.1",
-				"@ethersproject/wallet": "^5.8.0",
-				"@polymarket/clob-client": "^4.21.0",
-				"elysia": "^1.3.8",
-				"lru-cache": "^11.1.0",
-				"undici": "^7.15.0"
-			}
-		},
 		"node_modules/@inquirer/external-editor": {
 			"version": "1.0.2",
 			"resolved": "https://registry.npmjs.org/@inquirer/external-editor/-/external-editor-1.0.2.tgz",
@@ -1760,6 +1744,22 @@
 				"url": "https://opencollective.com/express"
 			}
 		},
+		"node_modules/@jsr/hk__polymarket": {
+			"version": "0.2.1",
+			"resolved": "https://npm.jsr.io/~/11/@jsr/hk__polymarket/0.2.1.tgz",
+			"integrity": "sha512-rK4IbprOl9ApPOHnai7Ajz8NYesD+PfZK54244oAXlgFvUW906MioQoMBQSpSMgc6dWOTIGgPBfKByWoUy0NoA==",
+			"dependencies": {
+				"@elysiajs/cors": "^1.3.3",
+				"@elysiajs/eden": "^1.3.2",
+				"@elysiajs/openapi": "^1.3.7",
+				"@elysiajs/swagger": "^1.3.1",
+				"@ethersproject/wallet": "^5.8.0",
+				"@polymarket/clob-client": "^4.21.0",
+				"elysia": "^1.3.8",
+				"lru-cache": "^11.1.0",
+				"undici": "^7.15.0"
+			}
+		},
 		"node_modules/@manypkg/find-root": {
 			"version": "1.1.0",
 			"resolved": "https://registry.npmjs.org/@manypkg/find-root/-/find-root-1.1.0.tgz",
@@ -5280,12 +5280,12 @@
 			}
 		},
 		"node_modules/zod-to-json-schema": {
-			"version": "3.24.6",
-			"resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.24.6.tgz",
-			"integrity": "sha512-h/z3PKvcTcTetyjl1fkj79MHNEjm+HpD6NXheWjzOekY7kV+lwDYnHw+ivHkijnCSMz1yJaWBD9vu/Fcmk+vEg==",
+			"version": "3.25.1",
+			"resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.25.1.tgz",
+			"integrity": "sha512-pM/SU9d3YAggzi6MtR4h7ruuQlqKtad8e9S0fmxcMi+ueAK5Korys/aWcV9LIIHTVbj01NdzxcnXSN+O74ZIVA==",
 			"license": "ISC",
 			"peerDependencies": {
-				"zod": "^3.24.1"
+				"zod": "^3.25 || ^4"
 			}
 		}
 	}
diff --git a/src/index.ts b/src/index.ts
index c3a41d3..dead092 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -42,12 +42,12 @@ async function main() {
 		server.addTool(tools.redeemPositionsTool);
 		server.addTool(tools.getPositionsTool);
 
-		console.log(
-			"✅ Trading features enabled (POLYMARKET_PRIVATE_KEY is configured)",
+		process.stderr.write(
+			"Trading features enabled (POLYMARKET_PRIVATE_KEY is configured)\n",
 		);
 	} else {
-		console.warn(
-			"ℹ️ Read-only mode: Set POLYMARKET_PRIVATE_KEY environment variable to enable trading features",
+		process.stderr.write(
+			"Read-only mode: Set POLYMARKET_PRIVATE_KEY environment variable to enable trading features\n",
 		);
 	}
 
@@ -57,6 +57,6 @@ async function main() {
 }
 
 main().catch((error) => {
-	console.error("🚨 Failed to start MCP server:", error);
+	console.error("Failed to start MCP server:", error);
 	process.exit(1);
 });
diff --git a/src/script.ts b/src/script.ts
index 0a8f145..c0c1b88 100644
--- a/src/script.ts
+++ b/src/script.ts
@@ -10,7 +10,7 @@ import { tradeApi } from "./services/trading.js";
  */
 async function placeMarketOrder() {
 	try {
-		console.log("🚀 Placing market order...");
+		console.log("Placing market order...");
 
 		// Market order parameters
 		const params = {
@@ -20,17 +20,17 @@ async function placeMarketOrder() {
 			amount: 1, // For BUY orders, this is the dollar amount ($USD) to spend
 		};
 
-		console.log("📋 Order parameters:", JSON.stringify(params, null, 2));
+		console.log("Order parameters:", JSON.stringify(params, null, 2));
 
 		// Execute the market order
 		const result = await tradeApi.placeMarketOrder(params);
 
-		console.log("✅ Market order placed successfully!");
-		console.log("📊 Result:", JSON.stringify(result, null, 2));
+		console.log("Market order placed successfully!");
+		console.log("Result:", JSON.stringify(result, null, 2));
 
 		return result;
 	} catch (error) {
-		console.error("❌ Error placing market order:", error);
+		console.error("Error placing market order:", error);
 
 		// Check if it's an approval error
 		if (error && typeof error === "object" && "message" in error) {
@@ -44,10 +44,10 @@ async function placeMarketOrder() {
 // Run the script
 placeMarketOrder()
 	.then(() => {
-		console.log("🎉 Script completed successfully");
+		console.log("Script completed successfully");
 		process.exit(0);
 	})
 	.catch((error) => {
-		console.error("💥 Script failed:", error);
+		console.error("Script failed:", error);
 		process.exit(1);
 	});
diff --git a/src/services/approvals.ts b/src/services/approvals.ts
index 1bafe08..dc53270 100644
--- a/src/services/approvals.ts
+++ b/src/services/approvals.ts
@@ -187,37 +187,37 @@ export class PolymarketApprovals {
 			{
 				key: "USDC_ALLOWANCE_FOR_CTF",
 				fn: () => usdc.approve(CTF_ADDRESS, constants.MaxUint256),
-				label: "USDC→CTF",
+				label: "USDC->CTF",
 			},
 			{
 				key: "USDC_ALLOWANCE_FOR_EXCHANGE",
 				fn: () => usdc.approve(EXCHANGE_ADDRESS, constants.MaxUint256),
-				label: "USDC→Exchange",
+				label: "USDC->Exchange",
 			},
 			{
 				key: "CTF_APPROVAL_FOR_EXCHANGE",
 				fn: () => ctf.setApprovalForAll(EXCHANGE_ADDRESS, true),
-				label: "CTF→Exchange",
+				label: "CTF->Exchange",
 			},
 			{
 				key: "USDC_ALLOWANCE_FOR_NEG_RISK_EXCHANGE",
 				fn: () => usdc.approve(NEG_RISK_EXCHANGE_ADDRESS, constants.MaxUint256),
-				label: "USDC→NegRiskExchange",
+				label: "USDC->NegRiskExchange",
 			},
 			{
 				key: "USDC_ALLOWANCE_FOR_NEG_RISK_ADAPTER",
 				fn: () => usdc.approve(NEG_RISK_ADAPTER_ADDRESS, constants.MaxUint256),
-				label: "USDC→NegRiskAdapter",
+				label: "USDC->NegRiskAdapter",
 			},
 			{
 				key: "CTF_APPROVAL_FOR_NEG_RISK_EXCHANGE",
 				fn: () => ctf.setApprovalForAll(NEG_RISK_EXCHANGE_ADDRESS, true),
-				label: "CTF→NegRiskExchange",
+				label: "CTF->NegRiskExchange",
 			},
 			{
 				key: "CTF_APPROVAL_FOR_NEG_RISK_ADAPTER",
 				fn: () => ctf.setApprovalForAll(NEG_RISK_ADAPTER_ADDRESS, true),
-				label: "CTF→NegRiskAdapter",
+				label: "CTF->NegRiskAdapter",
 			},
 		] as const;
 
@@ -226,7 +226,7 @@ export class PolymarketApprovals {
 			if (current.missing.includes(key)) {
 				const hash = await this.sendTx(fn, nonce++, waitConfs);
 				txHashes.push(hash);
-				console.log(`Approved ${label}: ${hash}`);
+				process.stderr.write(`Approved ${label}: ${hash}\n`);
 			}
 		}
 
diff --git a/src/services/config.ts b/src/services/config.ts
index c6672ea..565fdf0 100644
--- a/src/services/config.ts
+++ b/src/services/config.ts
@@ -32,7 +32,7 @@ export function getConfig(overrides: Partial<BaseConfig> = {}): BaseConfig {
 
 	const rpcUrl =
 		overrides.rpcUrl ??
-		process.env.POLYMARKET_RPC_URL ??
+		process.env.POLYGON_RPC_URL ??
 		"https://polygon-rpc.com";
 
 	const privateKey = overrides.privateKey ?? process.env.POLYMARKET_PRIVATE_KEY;
diff --git a/src/services/redemption.ts b/src/services/redemption.ts
index bac2138..88be854 100644
--- a/src/services/redemption.ts
+++ b/src/services/redemption.ts
@@ -174,7 +174,7 @@ export class PolymarketRedemption {
 							"No CTF tokens to redeem. Balance is 0 - position may have already been redeemed.",
 					};
 				}
-				console.log(`Token balance: ${tokenBalance.toString()}`);
+				process.stderr.write(`Token balance: ${tokenBalance.toString()}` + "\n");
 			}
 
 			// Check if market is resolved
@@ -220,9 +220,9 @@ export class PolymarketRedemption {
 					amounts = [tokenBalance, 0n];
 				}
 
-				console.log(`Redeeming negRisk position:`);
-				console.log(`  Condition ID: ${conditionIdBytes32}`);
-				console.log(`  Amounts: [${amounts[0]}, ${amounts[1]}]`);
+				process.stderr.write(`Redeeming negRisk position:` + "\n");
+				process.stderr.write(`  Condition ID: ${conditionIdBytes32}` + "\n");
+				process.stderr.write(`  Amounts: [${amounts[0]}, ${amounts[1]}]` + "\n");
 
 				const negRiskAdapter = this.getNegRiskAdapterContract();
 				tx = await negRiskAdapter.redeemPositions(conditionIdBytes32, amounts, {
@@ -240,9 +240,9 @@ export class PolymarketRedemption {
 					};
 				}
 
-				console.log(`Redeeming CTF position:`);
-				console.log(`  Condition ID: ${conditionIdBytes32}`);
-				console.log(`  Winning index sets: [${winningIndexSets.join(", ")}]`);
+				process.stderr.write(`Redeeming CTF position:` + "\n");
+				process.stderr.write(`  Condition ID: ${conditionIdBytes32}` + "\n");
+				process.stderr.write(`  Winning index sets: [${winningIndexSets.join(", ")}]` + "\n");
 
 				const ctf = this.getCtfContract();
 				tx = await ctf.redeemPositions(
@@ -256,7 +256,7 @@ export class PolymarketRedemption {
 				);
 			}
 
-			console.log(`Transaction submitted: ${tx.hash}`);
+			process.stderr.write(`Transaction submitted: ${tx.hash}` + "\n");
 
 			// Wait for confirmation
 			const receipt = await tx.wait(1);
diff --git a/src/services/trading.ts b/src/services/trading.ts
index a85884d..3a7b6cb 100644
--- a/src/services/trading.ts
+++ b/src/services/trading.ts
@@ -112,11 +112,11 @@ export class PolymarketTrading {
 			cfg.funderAddress,
 		);
 
-		console.log("✓ Polymarket trading client initialized");
-		console.log(`  - Signer: ${await ethersSigner.getAddress()}`);
-		console.log(`  - Signature Type: ${cfg.signatureType}`);
+		process.stderr.write("Polymarket trading client initialized");
+		process.stderr.write(`  - Signer: ${await ethersSigner.getAddress()}` + "\n");
+		process.stderr.write(`  - Signature Type: ${cfg.signatureType}` + "\n");
 		if (cfg.funderAddress) {
-			console.log(`  - Funder/Proxy: ${cfg.funderAddress}`);
+			process.stderr.write(`  - Funder/Proxy: ${cfg.funderAddress}` + "\n");
 		}
 	}
 
@@ -253,11 +253,11 @@ export class PolymarketTrading {
 
 		const client = this.getClient();
 
-		console.log(`📝 Placing ${args.side} order:`);
-		console.log(`   Token: ${args.tokenId}`);
-		console.log(`   Price: ${args.price}`);
-		console.log(`   Size: ${args.size}`);
-		console.log(
+		process.stderr.write(`Placing ${args.side} order:` + "\n");
+		process.stderr.write(`   Token: ${args.tokenId}` + "\n");
+		process.stderr.write(`   Price: ${args.price}` + "\n");
+		process.stderr.write(`   Size: ${args.size}` + "\n");
+		process.stderr.write(
 			`   Market: negRisk=${marketParams.negRisk}, tickSize=${marketParams.tickSize}`,
 		);
 
@@ -304,10 +304,10 @@ export class PolymarketTrading {
 
 		const client = this.getClient();
 
-		console.log(`🚀 Placing ${args.side} market order:`);
-		console.log(`   Token: ${args.tokenId}`);
-		console.log(`   Amount: ${args.amount}`);
-		console.log(
+		process.stderr.write(`Placing ${args.side} market order:` + "\n");
+		process.stderr.write(`   Token: ${args.tokenId}` + "\n");
+		process.stderr.write(`   Amount: ${args.amount}` + "\n");
+		process.stderr.write(
 			`   Market: negRisk=${marketParams.negRisk}, tickSize=${marketParams.tickSize}`,
 		);