List latest digests

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

Discloses that it is a read-only operation (consistent with annotation), lists possible errors (`unauthorized`, `rate_limited`), and explains the output scope without contradicting any annotations.

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?

Three concise sentences with front-loaded information: API, no parameters, output description, chaining guidance, and errors. No wasted words.

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 zero parameters and an output schema, the description covers purpose, usage, errors, and chaining. It is fully self-contained for an agent to invoke correctly.

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 parameters exist, and schema coverage is 100%. The description adds value by explaining what the tool returns (most recent digest per active competitor), exceeding the baseline of 3 for zero-param tools.

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 clearly states it returns the most recent digest per active competitor, using a specific API endpoint. It distinguishes from sibling tool `list_digests` by explaining that this is a one-shot entry point for the current batch day.

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?

Explicitly states that no prior call is needed and advises to use `list_digests` for older weeks or specific competitor history, providing clear when-to-use and when-not-to-use guidance.

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