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CC3-0

CoinCap MCP Server

by CC3-0

ta_slug_rsi_latest

Obtain the current Relative Strength Index (RSI) datapoint for a cryptocurrency. Configure with slug, period, interval, and smoothing.

Instructions

Latest RSI datapoint

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
slugYesAsset slug (e.g. bitcoin)
startNoStart timestamp in ms
endNoEnd timestamp in ms
periodNoRSI calculation period (default: 5)
smoothingNoSmoothing method (default: EMA)
fetchIntervalNoTimeframe for price bars
includeOriginalNoInclude original price data
Behavior1/5

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

With no annotations, the description must disclose behavior. It only states 'Latest RSI datapoint', omitting whether it is read-only, error handling (no data), latencies, or response structure. Minimal disclosure.

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?

Extremely concise (3 words) but at the expense of valuable information. Lacks front-loading of key details. For a tool with 7 parameters, this is under-specified.

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 exists, so the description should cover return values and behavior. It only says 'datapoint' without explaining format or error states. Incomplete given tool 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 coverage is 100%; all 7 parameters have descriptions. The description adds no extra meaning beyond the schema. Baseline 3 is appropriate.

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 'Latest RSI datapoint' clearly indicates the tool retrieves the most recent RSI value. It specifies the technical indicator (RSI) and 'latest' to differentiate from the sibling 'ta_slug_rsi' which likely returns historical series. The verb is implicit but clear.

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 like ta_slug_rsi (full history) or other latest indicator tools (ema, macd, etc.). The agent receives no context for selection.

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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