Get Fitatu Diet Summary

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

Annotations already cover read-only, idempotent, and open-world behavior. The description adds the authenticated-user scope and clarifies that the date range is inclusive, which is useful context. It does not add auth requirements, rate limits, or other behavioral details, but the annotation coverage lowers the burden.

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?

A single 15-word sentence that front-loads the verb and resource and includes the key scope (authenticated user, inclusive date range). There is no fluff, repetition of the title, or filler content.

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 read-only, two-parameter fetch with an output schema and safety annotations, the description plus schema fully specify how to call it. User scope and date inclusivity are stated, and the output schema covers return values, so nothing essential is missing.

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 100%: both fromDate and toDate have format and meaning descriptions, and the schema-level description states the fromDate <= toDate ordering constraint. The tool description adds no parameter-specific detail beyond the schema, so the baseline 3 applies.

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 ('Fetches') and a specific resource ('authenticated Fitatu user's nutrition and energy summary'), plus the inclusive date-range scope. This clearly distinguishes it from sibling getters like get_day_plan_items or get_body_measurement without requiring a schema read.

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 the use case: retrieve a nutrition/energy summary for a date range. However, it never explicitly states when to use this tool vs. alternatives or mentions any exclusions, leaving the routing to inference.

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