Get Food Diary (FatSecret)

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds the monthSummary behavior and the date scope, but does not disclose response structure or edge cases. With annotations providing a solid baseline, this is adequate.

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, front-loaded sentence that states the core function and the key variant. No wasted words; every part contributes to understanding.

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 simple read-only tool with two parameters and no output schema, the description plus annotations provide sufficient context. It lacks details on the exact entry fields or auth requirements, but the title and sibling context fill most gaps. A small gap remains regarding what a monthly summary entails, hence a 4 rather than 5.

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 description coverage is 0%, so the description must compensate. It does so by explaining the 'date' parameter (one date) and 'monthSummary' (true for a whole month), directly linking the parameter semantics to the function's behavior. This adds meaning beyond the raw schema properties.

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 the resource ('food diary entries') and the operation ('get'), with the scope options of one date or a whole month. It distinguishes from sibling tools by explicitly targeting food diary data, unlike weight, exercise, or recipe tools.

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 provides clear context for when to use the tool (for a specific date or month via monthSummary), but does not explicitly mention alternatives or when not to use it. The sibling list implies it is for food diary reads, but no exclusions are stated.

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