MCP Crypto Wallet EVM

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wallet_create_random

Generate a new Ethereum or EVM-compatible wallet with a random private key. Optionally encrypt it with a password, specify an HD path, or choose a locale for the wordlist.

Instructions

Create a new wallet with a random private key

Input Schema

TableJSON Schema

Name	Required	Description
`locale`	No	Optional locale for the wordlist
`password`	No	Optional password to encrypt the wallet
`path`	No	Optional HD path

Implementation Reference

src/handlers/wallet.ts:22-59 (handler)

The core handler function that implements the wallet_create_random tool logic using ethers.Wallet.createRandom() to generate a new random wallet, optionally encrypt it, and return wallet details.

export const createWalletHandler = async (input: any): Promise<ToolResultSchema> => {
  try {
    const options: any = {};

    if (input.path) {
      options.path = input.path;
    }

    if (input.locale) {
      options.locale = input.locale;
    }

    const wallet = ethers.Wallet.createRandom(options);

    let result: any = {
      address: wallet.address,
      mnemonic: wallet.mnemonic?.phrase,
      privateKey: wallet.privateKey,
      publicKey: wallet.publicKey
    };

    if (input.password) {
      // If a password is provided, encrypt the wallet
      const encryptedWallet = await wallet.encrypt(input.password);
      result.encryptedWallet = encryptedWallet;
    }

    return createSuccessResponse(`Wallet created successfully:
      Address: ${wallet.address}
      Private Key: ${wallet.privateKey}
      Public Key: ${wallet.publicKey}
      Mnemonic: ${wallet.mnemonic?.phrase}
      Encrypted Wallet: ${result.encryptedWallet ? "Yes" : "No"}
    `);
  } catch (error) {
    return createErrorResponse(`Failed to create wallet: ${(error as Error).message}`);
  }
};

src/tools.ts:52-64 (schema)

The input schema definition for the wallet_create_random tool, specifying optional parameters for password, HD path, and locale.

{
  name: "wallet_create_random",
  description: "Create a new wallet with a random private key",
  inputSchema: {
    type: "object",
    properties: {
      password: { type: "string", description: "Optional password to encrypt the wallet" },
      path: { type: "string", description: "Optional HD path" },
      locale: { type: "string", description: "Optional locale for the wordlist" }
    },
    required: []
  }
},

src/tools.ts:560-560 (registration)
Registration of the wallet_create_random tool name to its handler function createWalletHandler in the handlers dictionary.
```
"wallet_create_random": createWalletHandler,
```

src/tools.ts:39-552 (registration)

The tools array registration including the schema and name for wallet_create_random.

export const tools = [
  {
    name: "wallet_provider_set",
    description: "Set the provider URL. By default, the provider URL is set to the ETH mainnet or the URL set in the PROVIDER_URL environment variable.",
    inputSchema: {
      type: "object",
      properties: {
        providerURL: { type: "string", description: "The provider RPC URL" }
      },
      required: ["providerURL"]
    }
  },
  // Wallet Creation and Management
  {
    name: "wallet_create_random",
    description: "Create a new wallet with a random private key",
    inputSchema: {
      type: "object",
      properties: {
        password: { type: "string", description: "Optional password to encrypt the wallet" },
        path: { type: "string", description: "Optional HD path" },
        locale: { type: "string", description: "Optional locale for the wordlist" }
      },
      required: []
    }
  },
  {
    name: "wallet_from_private_key",
    description: "Create a wallet from a private key",
    inputSchema: {
      type: "object",
      properties: {
        privateKey: { type: "string", description: "The private key" }
      },
      required: ["privateKey"]
    }
  },
  {
    name: "wallet_create_mnemonic_phrase",
    description: "Create a mnemonic phrase",
    inputSchema: {
      type: "object",
      properties: {
        length: { type: "number", description: "The length of the mnemonic phrase", enum: [12, 15, 18, 21, 24] },
        locale: { type: "string", description: "Optional locale for the wordlist" }
      },
      required: ["length"]
    }
  },
  {
    name: "wallet_from_mnemonic",
    description: "Create a wallet from a mnemonic phrase",
    inputSchema: {
      type: "object",
      properties: {
        mnemonic: { type: "string", description: "The mnemonic phrase" },
        path: { type: "string", description: "Optional HD path" },
        locale: { type: "string", description: "Optional locale for the wordlist" }
      },
      required: ["mnemonic"]
    }
  },
  {
    name: "wallet_from_encrypted_json",
    description: "Create a wallet by decrypting an encrypted JSON wallet",
    inputSchema: {
      type: "object",
      properties: {
        json: { type: "string", description: "The encrypted JSON wallet" },
        password: { type: "string", description: "The password to decrypt the wallet" }
      },
      required: ["json", "password"]
    }
  },
  {
    name: "wallet_encrypt",
    description: "Encrypt a wallet with a password",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet to encrypt (private key, mnemonic, or JSON)" },
        password: { type: "string", description: "The password to encrypt the wallet" },
        options: { 
          type: "object", 
          description: "Optional encryption options",
          properties: {
            scrypt: {
              type: "object",
              properties: {
                N: { type: "number" },
                r: { type: "number" },
                p: { type: "number" }
              }
            }
          }
        }
      },
      required: ["wallet", "password"]
    }
  },

  // Wallet Properties
  {
    name: "wallet_get_address",
    description: "Get the wallet address",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." }
      },
      required: []
    }
  },
  {
    name: "wallet_get_public_key",
    description: "Get the wallet public key",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." }
      },
      required: []
    }
  },
  {
    name: "wallet_get_private_key",
    description: "Get the wallet private key (with appropriate security warnings)",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        password: { type: "string", description: "The password to decrypt the wallet if it's encrypted" }
      },
      required: []
    }
  },
  // Blockchain Methods
  {
    name: "wallet_get_balance",
    description: "Get the balance of the wallet",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        blockTag: { type: "string", description: "Optional block tag (latest, pending, etc.)" }
      },
      required: []
    }
  },
  {
    name: "wallet_get_chain_id",
    description: "Get the chain ID the wallet is connected to",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." }
      },
      required: []
    }
  },
  {
    name: "wallet_get_gas_price",
    description: "Get the current gas price",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." }
      },
      required: []
    }
  },
  {
    name: "wallet_get_transaction_count",
    description: "Get the number of transactions sent from this account (nonce)",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        blockTag: { type: "string", description: "Optional block tag (latest, pending, etc.)" }
      },
      required: []
    }
  },
  {
    name: "wallet_call",
    description: "Call a contract method without sending a transaction",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        transaction: { 
          type: "object", 
          description: "The transaction to call",
          properties: {
            to: { type: "string" },
            from: { type: "string" },
            data: { type: "string" },
            value: { type: "string" },
            gasLimit: { type: "string" },
            gasPrice: { type: "string" }
          },
          required: ["to"]
        },
        blockTag: { type: "string", description: "Optional block tag (latest, pending, etc.)" }
      },
      required: ["transaction"]
    }
  },

  // Transaction Methods
  {
    name: "wallet_send_transaction",
    description: "Send a transaction",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        transaction: { 
          type: "object", 
          description: "The transaction to send",
          properties: {
            to: { type: "string" },
            from: { type: "string" },
            data: { type: "string" },
            value: { type: "string" },
            gasLimit: { type: "string" },
            gasPrice: { type: "string" },
            nonce: { type: "number" },
            type: { type: "number" },
            maxFeePerGas: { type: "string" },
            maxPriorityFeePerGas: { type: "string" }
          },
          required: ["to"]
        }
      },
      required: ["transaction"]
    }
  },
  {
    name: "wallet_sign_transaction",
    description: "Sign a transaction without sending it",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        transaction: { 
          type: "object", 
          description: "The transaction to sign",
          properties: {
            to: { type: "string" },
            from: { type: "string" },
            data: { type: "string" },
            value: { type: "string" },
            gasLimit: { type: "string" },
            gasPrice: { type: "string" },
            nonce: { type: "number" },
            type: { type: "number" },
            maxFeePerGas: { type: "string" },
            maxPriorityFeePerGas: { type: "string" }
          },
          required: ["to"]
        }
      },
      required: ["transaction"]
    }
  },
  {
    name: "wallet_populate_transaction",
    description: "Populate a transaction with missing fields",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        transaction: { 
          type: "object", 
          description: "The transaction to populate",
          properties: {
            to: { type: "string" },
            from: { type: "string" },
            data: { type: "string" },
            value: { type: "string" },
            gasLimit: { type: "string" },
            gasPrice: { type: "string" },
            nonce: { type: "number" },
            type: { type: "number" },
            maxFeePerGas: { type: "string" },
            maxPriorityFeePerGas: { type: "string" }
          },
          required: ["to"]
        }
      },
      required: ["transaction"]
    }
  },

  // Signing Methods
  {
    name: "wallet_sign_message",
    description: "Sign a message",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        message: { type: "string", description: "The message to sign" }
      },
      required: ["message"]
    }
  },
  {
    name: "wallet_sign_typed_data",
    description: "Sign typed data (EIP-712)",
    inputSchema: {
      type: "object",
      properties: {
        wallet: { type: "string", description: "The wallet (private key, mnemonic, or JSON). If not provided, uses PRIVATE_KEY environment variable if set." },
        domain: { type: "object", description: "The domain data" },
        types: { type: "object", description: "The type definitions" },
        value: { type: "object", description: "The value to sign" }
      },
      required: ["domain", "types", "value"]
    }
  },
  {
    name: "wallet_verify_message",
    description: "Verify a signed message",
    inputSchema: {
      type: "object",
      properties: {
        message: { type: "string", description: "The original message" },
        signature: { type: "string", description: "The signature to verify" },
        address: { type: "string", description: "The address that supposedly signed the message" }
      },
      required: ["message", "signature", "address"]
    }
  },
  {
    name: "wallet_verify_typed_data",
    description: "Verify signed typed data",
    inputSchema: {
      type: "object",
      properties: {
        domain: { type: "object", description: "The domain data" },
        types: { type: "object", description: "The type definitions" },
        value: { type: "object", description: "The value that was signed" },
        signature: { type: "string", description: "The signature to verify" },
        address: { type: "string", description: "The address that supposedly signed the data" }
      },
      required: ["domain", "types", "value", "signature", "address"]
    }
  },

  // Provider Methods
  {
    name: "provider_get_block",
    description: "Get a block by number or hash",
    inputSchema: {
      type: "object",
      properties: {
        blockHashOrBlockTag: { type: "string", description: "Block hash or block tag (latest, pending, etc.)" },
        includeTransactions: { type: "boolean", description: "Whether to include full transactions or just hashes" }
      },
      required: ["blockHashOrBlockTag"]
    }
  },
  {
    name: "provider_get_transaction",
    description: "Get a transaction by hash",
    inputSchema: {
      type: "object",
      properties: {
        transactionHash: { type: "string", description: "The transaction hash" }
      },
      required: ["transactionHash"]
    }
  },
  {
    name: "provider_get_transaction_receipt",
    description: "Get a transaction receipt",
    inputSchema: {
      type: "object",
      properties: {
        transactionHash: { type: "string", description: "The transaction hash" }
      },
      required: ["transactionHash"]
    }
  },
  {
    name: "provider_get_code",
    description: "Get the code at an address",
    inputSchema: {
      type: "object",
      properties: {
        address: { type: "string", description: "The address to get code from" },
        blockTag: { type: "string", description: "Optional block tag (latest, pending, etc.)" }
      },
      required: ["address"]
    }
  },
  {
    name: "provider_get_storage_at",
    description: "Get the storage at a position for an address",
    inputSchema: {
      type: "object",
      properties: {
        address: { type: "string", description: "The address to get storage from" },
        position: { type: "string", description: "The storage position" },
        blockTag: { type: "string", description: "Optional block tag (latest, pending, etc.)" }
      },
      required: ["address", "position"]
    }
  },
  {
    name: "provider_estimate_gas",
    description: "Estimate the gas required for a transaction",
    inputSchema: {
      type: "object",
      properties: {
        transaction: { 
          type: "object", 
          description: "The transaction to estimate gas for",
          properties: {
            to: { type: "string" },
            from: { type: "string" },
            data: { type: "string" },
            value: { type: "string" }
          }
        }
      },
      required: ["transaction"]
    }
  },
  {
    name: "provider_get_logs",
    description: "Get logs that match a filter",
    inputSchema: {
      type: "object",
      properties: {
        filter: { 
          type: "object", 
          description: "The filter to apply",
          properties: {
            address: { type: "string" },
            topics: { type: "array", items: { type: "string" } },
            fromBlock: { type: "string" },
            toBlock: { type: "string" }
          }
        }
      },
      required: ["filter"]
    }
  },
  {
    name: "provider_get_ens_resolver",
    description: "Get the ENS resolver for a name",
    inputSchema: {
      type: "object",
      properties: {
        name: { type: "string", description: "The ENS name" }
      },
      required: ["name"]
    }
  },
  {
    name: "provider_lookup_address",
    description: "Lookup the ENS name for an address",
    inputSchema: {
      type: "object",
      properties: {
        address: { type: "string", description: "The address to lookup" }
      },
      required: ["address"]
    }
  },
  {
    name: "provider_resolve_name",
    description: "Resolve an ENS name to an address",
    inputSchema: {
      type: "object",
      properties: {
        name: { type: "string", description: "The ENS name to resolve" }
      },
      required: ["name"]
    }
  },

  // Network Methods
  {
    name: "network_get_network",
    description: "Get the current network information",
    inputSchema: {
      type: "object",
      properties: {},
      required: []
    }
  },
  {
    name: "network_get_block_number",
    description: "Get the current block number",
    inputSchema: {
      type: "object",
      properties: {},
      required: []
    }
  },
  {
    name: "network_get_fee_data",
    description: "Get the current fee data (base fee, max priority fee, etc.)",
    inputSchema: {
      type: "object",
      properties: {},
      required: []
    }
  }
];

Tool Definition Quality

C2.9/5.0

Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden of behavioral disclosure. It states the tool creates a wallet but doesn't mention security implications, storage location, whether the wallet is saved or ephemeral, or potential side effects like overwriting existing wallets. This leaves critical behavioral traits unspecified.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that directly states the tool's purpose without unnecessary words. It is front-loaded and wastes no space, making it easy to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of wallet creation (a security-sensitive operation) and the lack of annotations and output schema, the description is insufficient. It doesn't explain what the tool returns (e.g., wallet address, private key, or object), error conditions, or important behavioral details, leaving significant gaps for an AI agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema fully documents the three optional parameters (locale, password, path). The description adds no parameter-specific information beyond the schema, but the baseline is 3 since the schema provides adequate coverage without contradiction.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('create a new wallet') and method ('with a random private key'), which distinguishes it from sibling tools like wallet_create_mnemonic_phrase or wallet_from_private_key. However, it doesn't specify what type of wallet (e.g., cryptocurrency) or context, leaving some ambiguity.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives like wallet_create_mnemonic_phrase or wallet_from_private_key. The description lacks context about use cases, prerequisites, or trade-offs, offering minimal direction for selection.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Install Server

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