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

With no annotations, the description carries the full burden for behavioral disclosure. It does not mention that the tool is read-only, any authentication requirements, rate limits, or error handling (e.g., for invalid tickers). The minimal description fails to convey key behavioral traits.

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 sentence, making it concise. However, it lacks structure (e.g., bullet points or separate sections for usage) and does not front-load critical information beyond the basic purpose.

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 presence of an output schema and the moderate complexity (2 parameters, comparison across multiple tickers), the description should provide more context. It does not explain what valuation metrics are included, how the output is structured, or any constraints, leaving the agent underinformed.

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?

Schema description coverage is 0%, so the description must explain parameter usage. It hints at the 'tickers' parameter but does not clarify the 'fields' parameter (optional, default null, possible string or null). No details on how to format tickers or fields are provided.

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 action ('compare'), the resource ('valuation metrics'), and the scope ('across multiple tickers'). It effectively distinguishes the tool from sibling tools like 'get_metrics' or 'screen_companies' which are for single-ticker or screening operations.

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?

No guidance is provided on when to use this tool versus alternatives such as 'get_metrics' for single-ticker valuation or 'screen_companies' for filtering. There is no mention of prerequisites, limitations, or preferred scenarios.

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