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

Annotations already mark this as non-read-only, idempotent, and non-destructive, but the description adds no context about what happens to existing goals, whether null values reset fields, or any auth considerations. 'Store daily goals in this service' does not go beyond the name and 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?

The single sentence is efficient and free of filler, but it is under-specified rather than helpfully concise. It does not use the available space to provide useful operational context.

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?

Although the output schema and parameter descriptions are rich, the operation semantics are missing: an agent cannot tell whether this replaces all goals, updates only provided fields, or treats null as 'no change' vs 'clear'. Sibling ambiguity with update_nutrition also remains unresolved.

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%, so the schema documents all eight parameters thoroughly. The description itself adds no parameter semantics, which is acceptable at the baseline 3.

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 ('Store') and resource ('daily goals'), clearly indicating a write operation. It does not, however, mention how this differs from the sibling update_nutrition, so it stops short of a full 5.

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 guidance on when to call set_nutrition_goals versus update_nutrition or delete_nutrition. No prerequisites, exclusions, or alternative-selection hints are provided.

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