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n1n4du

MTRKR MCP Server

by n1n4du

mtrkr_wallet_nfts

Retrieve NFTs held by a wallet on MegaETH, covering ERC-721, ERC-1155, and ERC-404 tokens. Returns up to 25 items sorted by floor price with name, collection, image, and attributes.

Instructions

Get NFTs held by a wallet on MegaETH (ERC-721, ERC-1155, ERC-404). Merges data from Blockscout, OpenSea, badge NFTs, and on-chain enumeration. Returns up to 25 items sorted by floor price, with name, collection, image, token type, floor price, and attributes.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
addressYesWallet address (0x...) or .mega name
Behavior4/5

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

With no annotations, the description carries full burden. It discloses data merging from multiple sources, a 25-item limit, sorting by floor price, and return fields. However, it omits potential failure reasons or authentication needs.

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 front-loads the action and includes all necessary details without redundancy. Every phrase contributes value.

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 no output schema, the description adequately covers return format and sorting. It explains data sources and constraints, though it could clarify terms like 'badge NFTs' for full completeness.

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% and the parameter description in the schema already explains the address format. The tool description adds 'on MegaETH' but does not significantly enhance meaning beyond 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 it retrieves NFTs held by a wallet on MegaETH, listing specific token standards (ERC-721, ERC-1155, ERC-404) and distinguishing it from sibling tools like mtrkr_wallet_tokens for fungible tokens.

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

Usage Guidelines3/5

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

The description implies usage for NFT queries but does not explicitly state when to use this tool over alternatives or when not to use it. Sibling names provide context, but the description itself lacks explicit guidance.

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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