google_finance_markets_headline

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

No annotations are provided, so the description carries the full burden. It only states what the tool does, not any behavioral traits like caching, rate limits, or whether the headline updates frequently. The description adds no value beyond the tool name.

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?

Two sentences but redundant—'Google Finance top headline' and 'Returns the top Google Finance headline' convey the same information. Could be condensed to one sentence without loss.

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?

For a tool with no output schema and simple function, the description could still explain what constitutes a 'top headline' (e.g., most recent, most shared). It lacks completeness for an agent to fully understand the tool's capability.

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 tool has no parameters, so the description need not explain any. Schema coverage is 100% vacuously. The description is adequate for parameter semantics.

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 states it returns the top Google Finance headline, providing a specific verb and resource. However, 'top headline' is ambiguous—does it mean the most recent, most popular, or something else? It distinguishes from siblings like 'google_finance_news' but lacks precision.

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 on when to use this tool versus alternatives like 'google_finance_news' or 'google_finance_markets_category_news'. The agent must infer from the name alone, which is insufficient.

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