get_trade_book

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

The annotation openWorldHint is present but not explained, and the description adds context about return content (fill prices, quantities, timestamps). However, it does not disclose any additional behavioral traits such as side effects, authentication needs, or rate limits. Since the tool is a read operation, the lack of such disclosures is acceptable but not rich.

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 a single concise sentence that efficiently communicates the purpose and return fields. Every word earns its place, with no filler or redundancy.

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 the low complexity (no parameters, no output schema), the description covers the essential return information: fill prices, quantities, timestamps, and the time bound 'today'. It does not detail the output structure, but for a simple list tool this is reasonably complete. Sibling tools provide enough context for differentiation.

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?

There are zero parameters, so the description does not need to explain any. The baseline for 0 params is 4, and the description adds no parameter information beyond the schema, which is already fully covering (vacuously).

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 uses a specific verb 'Get' and identifies the resource as 'executed trades for today', with details on fill prices, quantities, and timestamps. This clearly distinguishes it from sibling tools like get_order_book (orders) or get_positions (positions).

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 implies usage context by specifying 'executed trades for today', which suggests this tool is for retrieving today's fills. However, it does not explicitly state when to use it over alternatives or provide any exclusions. No alternatives are mentioned.

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