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ERC-8004 MCP Server

ERC-8004 MCP Server

by wpank
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript

erc8004_list_agents

Read-only

Browse ERC-8004 registered AI agents with pagination, sorting, and filtering by protocol and chain.

Instructions

Browse ERC-8004 registered AI agents with pagination and sorting. Supports protocol and chain filtering.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "erc8004_list_agents"
  }
}

Input Schema

NameRequiredDescriptionDefault
pageNoPage number (1-based, default: 1)
chainNoFilter by chain ID (e.g., '1' for mainnet, '137' for Polygon)
sortByNoField to sort by (default: createdAt)createdAt
pageSizeNoNumber of agents per page (default: 20, max: 100)
protocolNoFilter by protocol support: 'mcp' or 'a2a'
sortDirectionNoSort direction (default: desc)desc

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4/5.0
Behavior4/5

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

Annotations already provide readOnlyHint=true, so the description does not need to restate that. The description adds context about supported filtering (protocol, chain) and pagination behavior, which is consistent with the annotations. There is no contradiction.

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 concise, consisting of two sentences with no redundant information. Every part is useful and front-loaded with the core purpose.

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?

For a list tool with 6 parameters, no output schema, and clear annotations, the description adequately states the purpose and key features. It could be slightly improved by hinting at the response structure (e.g., an array of agents), but it is largely complete given the complexity.

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 baseline is 3. The description does not add additional meaning beyond what the schema provides for each parameter. It merely summarizes the filtering feature.

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 uses a specific verb 'Browse' and clearly identifies the resource as 'ERC-8004 registered AI agents'. It also lists key features (pagination, sorting, protocol/chain filtering) that distinguish it from siblings like erc8004_search_agents, which is implied to have different querying capabilities.

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 by stating the tool's capabilities but does not explicitly guide when to use this tool versus alternatives like erc8004_search_agents or erc8004_get_agent. No when-to-use or when-not-to-use advice is given.

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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