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OpenZeppelin

OpenZeppelin Contracts MCP Server

Official
by OpenZeppelin

solidity-erc20

Generate ERC-20 token contract source code with customizable features for burnable, pausable, mintable, voting, flash loans, and cross-chain bridging.

Instructions

Make a fungible token per the ERC-20 standard.

Returns the source code of the generated contract, formatted in a Markdown code block. Does not write to disk.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesThe name of the contract
symbolYesThe short symbol for the token
decimalsNoThe number of decimals used to represent token amounts. Defaults to 18.
burnableNoWhether token holders will be able to destroy their tokens
pausableNoWhether privileged accounts will be able to pause specifically marked functionality. Useful for emergency response.
premintNoThe number of tokens to premint for the deployer.
premintChainIdNoThe chain ID of the network on which to premint tokens.
mintableNoWhether privileged accounts will be able to create more supply or emit more tokens
callbackNoWhether to include support for code execution after transfers and approvals on recipient contracts in a single transaction.
permitNoWhether without paying gas, token holders will be able to allow third parties to transfer from their account.
votesNoWhether to keep track of historical balances for voting in on-chain governance. Voting durations can be expressed as block numbers or timestamps.
flashmintNoWhether to include built-in flash loans to allow lending tokens without requiring collateral as long as they're returned in the same transaction.
crossChainBridgingNoWhether to allow authorized bridge contracts to mint and burn tokens for cross-chain transfers. Options are to use custom bridges on any chain, to embed an ERC-7786 based bridge directly in the token contract, or to use the SuperchainERC20 standard with the predeployed SuperchainTokenBridge. The SuperchainERC20 feature is only available on chains in the Superchain, and requires deploying your contract to the same address on every chain in the Superchain.
crossChainLinkAllowOverrideNoWhether to allow replacing a crosschain link that has already been registered. Only used if crossChainBridging is set to "erc7786native".
namespacePrefixNoThe prefix for ERC-7201 namespace identifiers. It should be derived from the project name or a unique naming convention specific to the project. Used only if the contract includes storage variables and upgradeability is enabled. Default is "myProject".
accessNoThe type of access control to provision. Ownable is a simple mechanism with a single account authorized for all privileged actions. Roles is a flexible mechanism with a separate role for each privileged action. A role can have many authorized accounts. Managed enables a central contract to define a policy that allows certain callers to access certain functions.
upgradeableNoWhether the smart contract is upgradeable. Transparent uses more complex proxy with higher overhead, requires less changes in your contract. Can also be used with beacons. UUPS uses simpler proxy with less overhead, requires including extra code in your contract. Allows flexibility for authorizing upgrades.
infoNoMetadata about the contract and author
Behavior3/5

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

The description discloses that the tool returns source code and does not write to disk, which is useful. However, no annotations are provided, and there is no discussion of side effects, permissions, or state changes beyond code generation.

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 two sentences, front-loaded with the core purpose and key behavioral notes. No unnecessary words.

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

Completeness4/5

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

The description covers the return format and a critical side effect (no disk write). For a code generation tool with 18 parameters, it is fairly complete, though it could mention error handling or concurrency implications.

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 coverage is 100%, so the baseline is 3. The description does not add any parameter-specific information beyond what is in the schema.

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

Purpose5/5

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

The description clearly states the tool generates a fungible token per the ERC-20 standard, returning source code in a Markdown code block. It distinguishes from siblings like solidity-erc1155 and solidity-erc721 by specifying the standard.

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 on when to use this tool versus alternatives like solidity-erc721. No mention of prerequisites or when not to use.

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

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