get_crypto_market_info

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states that it returns current exchange rates, but it does not mention that it makes an external API call (to Alpha Vantage), potential rate limits, authentication requirements, or possible failure modes. For a tool that performs network I/O, this lack of transparency is a notable gap.

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 concise and well-structured. It front-loads the purpose, then lists parameters with examples, and concludes with the return type. Every sentence is informative, and there is no redundant or vague content.

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?

Given the tool's simplicity (two parameters, no output schema, no annotations), the description covers the essential information: purpose, parameters, and return value. However, it could be more complete by describing the exact structure of the returned exchange rates or noting any constraints (e.g., maximum number of symbols). Still, it is sufficient for a basic getter tool.

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 no descriptions for its parameters (0% coverage), so the description fully compensates. It provides clear semantics for crypto_ids ('Comma-separated list of cryptocurrency symbols (e.g., 'BTC,ETH')') and currency ('The fiat currency to compare against (default: 'USD')'), including an example and the default value. This adds significant value beyond what the schema provides.

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's function: 'Get market information for one or more cryptocurrencies using Alpha Vantage.' It specifies the verb (get), the resource (market information for cryptocurrencies), and the data source (Alpha Vantage). This is unambiguous and distinct even in the absence of sibling tools.

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 gives clear context that this tool is used for obtaining cryptocurrency market information, and it explains the required parameters. It does not explicitly mention alternatives or when not to use it, but since there are no sibling tools, this is adequate. It could be improved by noting that it provides current exchange rates but not historical data, but this is not a major gap.

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