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OpenZeppelin

OpenZeppelin Contracts MCP Server

Official
by OpenZeppelin

stellar-non-fungible

Generate a non-fungible token contract compatible with SEP-50 and similar to ERC-721. Customize with name, symbol, metadata URI, and optional features like burnable, pausable, or upgradeable.

Instructions

Make a non-fungible token per the Non-Fungible Token Standard, compatible with SEP-50, similar to ERC-721.

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
tokenUriNoThe metadata URI returned by the token contract for every NFT.
burnableNoWhether token holders will be able to destroy their tokens
votesNoWhether to enable vote checkpoints and delegation for governance.
enumerableNoWhether the NFTs are enumerable (can be iterated over).
consecutiveNoTo batch mint NFTs instead of minting them individually (sequential minting is mandatory).
pausableNoWhether privileged accounts will be able to pause specifically marked functionality. Useful for emergency response.
mintableNoWhether privileged accounts will be able to create more supply or emit more tokens
sequentialNoWhether the IDs of the minted NFTs will be sequential.
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.
explicitImplementationsNoWhether the contract should use explicit trait implementations instead of using the default ones provided by the library.
upgradeableNoWhether the contract can be upgraded.
infoNoMetadata about the contract and author
Behavior5/5

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

With no annotations provided, the description fully discloses key behavioral traits: the tool returns source code in a Markdown code block and performs no disk writes. This tells the agent exactly what to expect in terms of output and side effects.

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 consists of two concise sentences. The first states the purpose and standard, the second explains the output and side-effect. It is front-loaded and contains no unnecessary information.

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?

Given the tool's complexity (14 parameters, nested objects) and no output schema, the description covers the essentials: what it generates and its format. It could elaborate on how parameters affect the generated code, but the schema fills that gap.

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 input schema already documents all 14 parameters. The description adds no additional parameter-level meaning beyond what the schema provides, warranting the baseline score of 3.

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's purpose: to make a non-fungible token per the Non-Fungible Token Standard, compatible with SEP-50, similar to ERC-721. This distinguishes it from siblings like stellar-fungible (fungible tokens) and solidity-erc721 (Ethereum NFTs).

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

Usage Guidelines4/5

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

The description mentions that the tool returns source code and does not write to disk, providing clear context for when to use it (generate code). It does not explicitly state when not to use it or suggest alternatives, but the sibling list helps differentiate usage.

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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