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CC3-0

CoinCap MCP Server

by CC3-0

agentFriendly_assets_search

Search cryptocurrency assets by symbol, name, slug, or token address. Sort results by price, volume, market cap, or 24h change.

Instructions

Search and discover crypto assets

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
searchNoSearch by asset symbol, name, slug, or token address (0x...)
limitNoNumber of results to return (max 100)
offsetNoNumber of results to skip for pagination
sortByNoField to sort by
sortOrderNoSort order
Behavior2/5

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

With no annotations, the description bears full responsibility for behavioral transparency. It fails to disclose that this is a read operation, lacks details on pagination, sorting, or rate limits, and does not mention that it returns a list of assets.

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

Conciseness3/5

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

The description is a single sentence, which is concise, but it lacks substantive information. Every word counts, but the sentence is too vague to be fully effective.

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?

Without an output schema, the description should clarify return values or behavior. It does not, leaving the agent without knowledge of what fields or structure the search results will have.

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?

The input schema has 100% description coverage, so each parameter is already explained. The tool description adds no additional semantics beyond the schema, meeting the baseline for this dimension.

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 'Search and discover crypto assets' clearly states the verb and resource. However, it does not differentiate from sibling tools like 'assets' or 'assets_slug', which may also serve related purposes.

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, such as when a general search is needed versus fetching a specific asset. No prerequisites or exclusion criteria are mentioned.

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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