coingecko_coin_analysis

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

No annotations are provided, so the description must fully disclose behavior. It states the tool returns 'derived price-chart metrics' and is 'not investment advice or real-time trading data', but it does not specify whether the operation is read-only, what metrics are derived, or any limitations on the data freshness. This leaves some ambiguity.

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

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

The description is a single paragraph of three sentences, which is concise and to the point. No superfluous information is present, though it could be better structured with separate lines for usage and disclaimers.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has no output schema, yet the description does not describe the return format or the specific 'derived metrics' (e.g., moving averages, volatility). Given the complexity of chart analysis, this is a significant gap. Additionally, it does not explain how the 'range' parameter affects the output.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage for all 4 parameters, so the schema already conveys their meanings. The description adds minor value by mentioning the 'vs_currency enum' and that data comes from 'public chart JSON', but it does not explain the 'range' parameter or 'include_annotations' beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool performs 'coin chart analysis' and returns 'derived price-chart metrics'. It specifies the data source (CoinGecko public chart JSON), distinguishing it from nearby tools like coingecko_coin (likely basic coin info) or coingecko_markets (market data).

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

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

The description mentions support for the 'vs_currency enum' and includes a disclaimer about not being real-time trading data, but it does not explicitly guide when to use this tool versus the many sibling tools in the Coingecko family, such as coingecko_coin, coingecko_markets, or coingecko_chains.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.