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CC3-0

CoinCap MCP Server

by CC3-0

assets_slug_history

Retrieve historical price data for a cryptocurrency asset by specifying slug, interval, and optional start/end timestamps.

Instructions

Retrieve historical data for a specific asset

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
slugYesThe slug of the asset
intervalYesinterval choices m1 m5 m15 m30 h1 h2 h6 h12 d1
startNoUNIX time in milliseconds. Omitting will return the most recent asset history.
endNoThe end timestamp for the historical data.
Behavior2/5

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

No annotations provided; the description only states 'retrieve historical data'. It does not disclose whether the tool is read-only, any rate limits, pagination, or other behavioral traits beyond the basic operation.

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

Conciseness4/5

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

The description is a single sentence with 6 words, very concise and front-loaded. However, it could benefit from a bit more context given the multiple parameters.

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?

No output schema is provided, and the description does not hint at the return format. With many sibling tools that may have specific history types (e.g., marketcap, OHLC), the description is incomplete for effective use.

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 parameters are already explained. The description adds no extra meaning beyond the schema, placing it at baseline 3.

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 'Retrieve historical data for a specific asset' clearly states the verb and resource. However, it does not differentiate from sibling tools like agentFriendly_history_slug or assets_slug_marketcap-history, which also retrieve historical data for assets.

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. With many sibling tools for historical data, the description lacks context on selection criteria.

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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