compare_cryptos

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

With no annotations provided, the description carries full burden and excels. It comprehensively details side effects (read-only, no side effects), authentication (none for basic), rate limits (10/day free, unlimited pro), error handling (structured errors), idempotency (fully idempotent), and data privacy (no storage). This exceeds typical transparency requirements.

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 well-structured with clear sections, but it contains redundancy between the initial 'Behavior' bullet and the later 'Behavioral Transparency' section, both stating read-only and stateless nature. The front-loaded main purpose is good, but some sentences could be merged or removed to improve conciseness.

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 moderate complexity (2 params, output schema exists), the description covers purpose, usage guidelines, and behavioral traits thoroughly. The only gap is the weak parameter description, which hurts completeness. The output schema existence reduces the need to explain return values, but a brief note on what the comparison output contains would be beneficial.

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 0% coverage, so the description must compensate. However, the 'Args' section merely repeats the parameter names and types ('symbols (str)', 'api_key (str)') without adding meaning, format constraints, or usage context. The earlier description does clarify symbols format (comma-separated), but that is not attributed to the parameter. Overall, this fails to add value 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 compares cryptocurrencies side by side, with a specific verb and resource. The example 'BTC,ETH,SOL' clarifies input format. However, it does not explicitly distinguish this tool from siblings like calculate_portfolio or track_price, which would strengthen clarity.

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 includes 'When to use' and 'When NOT to use' sections, providing explicit guidance. However, the when-to-use text is generic ('structured analysis or classification of inputs against established frameworks') and not specific to comparing cryptocurrencies, reducing its practical value. No mention of alternative sibling tools.

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