get_trade_dates

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

No annotations provided, so description carries full burden. It accurately describes the output format and that the tool is a fetch (read) operation. While it does not explicitly state non-destructiveness, the name and description make it clear. Could mention rate limits or authentication but not necessary for this simple tool.

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: one sentence for purpose, then a brief args section. No unnecessary words. Front-loaded with key information. Every sentence earns its place.

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 no output schema, description explains return rows. It does not cover edge cases (e.g., invalid dates), but for a simple calendar tool with two optional parameters, it is sufficiently complete. Could mention what happens if no dates provided, but implied by 'optional'.

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 coverage is 0% (schema descriptions are empty), but the tool description adds parameter semantics: 'start_date: Optional YYYY-MM-DD' and similarly for end_date. This provides format and optionality beyond the bare schema. Adds meaningful context.

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?

Description clearly states 'Fetch trading calendar' with specific output columns (calendar_date, is_trading_day). Distinguishes from sibling tools like get_latest_trading_date by indicating it returns a range. Purpose is unambiguous.

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?

Description implies usage for obtaining a trading calendar within a date range, but does not explicitly state when to use this tool versus alternatives like get_latest_trading_date. No exclusions or prerequisites are mentioned. Only implied context.

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