yahoo_price

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

Annotations already establish readOnlyHint=true, openWorldHint=true, and destructiveHint=false, and the description does not contradict those. It adds the Yahoo Finance data source and real-time character, but provides no further behavioral context such as rate limits, latency concerns, or what the quote response contains.

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: one purpose sentence plus a short Args section with examples. Every line adds necessary signal, and the main purpose appears first.

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 one-parameter, read-only quote tool, the description is mostly complete and gives an agent enough to invoke it correctly. The remaining gaps are the absence of any output-shape note and the lack of guidance that would disambiguate from similar-sounding sibling tools.

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 schema description coverage is 0%, so the description carries the full burden for the symbol parameter. It compensates well with concrete examples covering equities, crypto, ETFs, indices, forex, and foreign markets, making the expected symbol format genuinely actionable.

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?

States a specific verb+resource and scope: 'Real-time price quote from Yahoo Finance for any stock, crypto, ETF or index.' It is exactly clear what data this tool returns. It does not name how it differs from closely related sibling tools such as stock_prices, so it is not fully differentiated.

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 gives no explicit when-to-use or when-not-to-use guidance and names no alternatives. Given the sibling list contains overlapping-sounding tools like stock_prices, the agent receives no help separating them by context or intent.

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