financial_news

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds useful context by naming the data source (Marketaux), noting it is licensed, and emphasizing real-time behavior. However, it does not disclose potential rate limits, output shape, or how frequently the news updates.

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 compact and front-loaded, with a clear one-sentence overview followed by a concise, readable parameter breakdown. Every sentence adds value and there is no filler or redundant information.

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?

All three parameters are documented and the source is identified, making invocation straightforward. However, there is no output schema and the description does not describe the response format or what fields are returned for each news item. For a news-fetching tool, that gap is moderate but not fatal.

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 compensate, and it does. Each parameter is explained: symbol with examples and the 'None = all news' behavior, category with allowed values, and limit with a clear meaning. This goes beyond the bare schema, though it could be more precise about exact accepted values or constraints.

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 indicates the tool provides real-time financial news from Marketaux. It lacks an explicit verb like 'retrieve' or 'fetch,' but the function name and content make the purpose unambiguous. There are no direct news-focused siblings, so differentiation is not a concern.

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 about when to use this tool versus alternatives. It does not mention any exclusions, prerequisites, or conditions that would route an agent to a sibling tool. The parameter list implies usage but does not state it explicitly.

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