add_items_to_shopping_list

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

No annotations are provided, so the description carries full responsibility. It only states the basic action and does not disclose whether items are appended, duplicates handled, list existence required, or any auth needs. For a mutating tool, this is a significant transparency gap.

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 one concise sentence with clear verb-first structure and an example. No unnecessary words, perfectly sized for the simple tool.

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?

The tool has a simple schema and an output schema exists, so return values need not be described. The purpose is clear, but it lacks explicit guidance on alternatives and behavioral details like merge semantics. Adequate but not comprehensive for the sibling context.

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 schema has 0% description coverage, so the description must compensate. It adds meaning by specifying 'freie Artikel' and giving an example 'Milch', clarifying the strings are product names. However, it doesn't explain constraints like max count or behavior on duplicates, so compensation is partial.

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 'Setzt' (sets) with a clear resource 'Einkaufsliste' (shopping list), and clarifies it is for 'freie Artikel' (free items). This distinguishes it from the sibling tool 'add_recipe_to_shopping_list', making the purpose unambiguous.

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 use for arbitrary items not tied to recipes, which hints at when to use it versus the sibling add_recipe_to_shopping_list. However, it does not explicitly state when to use this tool or exclusions, leaving usage guidance mostly implicit.

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