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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint, so no safety disclosure is needed. The description adds valuable semantic context by clarifying that 'goals' is the Connect auto-adjusted target rather than calories_burned, which prevents misinterpretation of the returned data.

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 compact, front-loaded with what the tool returns, and every clause earns its place. The clarifying sentence about goals is short and prevents a likely misunderstanding.

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 the rich input schema, output schema, and safety annotations, the description covers the core return semantics. It lacks only explicit routing guidance versus overlapping siblings, but that is outside the minimal context for invoking the tool.

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 every parameter is already documented in the input schema. The description adds no parameter-specific meaning beyond confirming the everyday summary context.

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 states a specific resource (Garmin Connect daily overview) and the exact contents: consumed vs calorie/macro goals, remaining, and foods. It also distinguishes the meaning of 'goals' from calories_burned, differentiating this tool from nutrition-goal-oriented siblings.

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?

No explicit guidance is given about when to choose this tool over siblings like list_nutrition or get_nutrition_goals. The usage intent is only implied by the tool name and title; there are no conditions, exclusions, or alternative recommendations.

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