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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds only the raw endpoint path, which conveys little behavioral value – nothing about return contents, entry granularity, or auth/rate limitations.

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?

Two short sentences with the resource front-loaded and no padding. The second sentence restating the HTTP endpoint is low-value repetition, keeping it short of a 5.

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 single-parameter read tool this is minimally viable: the parameter and safety profile are covered by schema and annotations. With no output schema, the description could have said what the log contains (entries, nutrients), but it does not.

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 single parameter cdate has 100% schema description coverage (type, date format, UTC convention), so the schema carries the semantics. The description adds nothing beyond it, which is the expected baseline when coverage is complete.

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 resource (the food log) and scopes it precisely to a single date, which implicitly distinguishes it from the sibling get_nutrition_food_log_range. However, it never names a sibling or differentiates from get_nutrition_daily_meals, so it stays at a clear-but-undifferentiated 4.

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?

There is no explicit when-to-use statement and no mention of the obvious alternatives (get_nutrition_food_log_range for a span, get_nutrition_daily_meals for meal breakdowns). Usage is only faintly implied by the word 'one date', which is not enough to route an agent.

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