valyu_answer

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

Discloses use of an external API and cost, but no annotations provided. Missing details about side effects, rate limits, or whether it is read-only. Adequate but not thorough.

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?

Extremely concise: two sentences, no wasted words. First sentence defines purpose, second adds cost context.

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?

Output schema exists, reducing need to describe return values. However, lacks context on query scope, fast_mode behavior, or limitations. Adequate but minimal.

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?

No parameter descriptions in schema or description; 'query' and 'fast_mode' are not explained. Schema coverage is 0%, so description adds no meaning beyond names and types.

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?

Clearly states the tool retrieves an AI-synthesized answer with citations, distinguishing it from general search tools. However, it does not explicitly differentiate from sibling tools like build_research_pack.

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?

Mentions cost, but provides no guidance on when to use this tool versus alternatives (e.g., search_web, build_research_pack). Lacks when-to-use or when-not-to-use context.

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