get_user_profile

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states what data is returned (ratings, reviews, item count, activity) but does not mention authentication requirements, rate limits, whether the user must exist, what happens on error for invalid IDs, or any pagination/truncation behavior for reviews.

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?

Efficient single sentence that packs useful specifics about return content. No wasted words. Could arguably be slightly richer given the behavioral gaps, but as written it is well-structured and front-loaded.

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 is simple (1 param, no output schema, no nested objects), so the baseline need is modest. The description communicates the return contents adequately. However, without annotations, behavioral details like error handling for nonexistent users or auth requirements are absent, leaving some gaps for a data-fetch 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 coverage is 100% and the user_id parameter already has a clear description ('Vinted user ID from search results or item details'). The description adds that this yields profile data but does not add meaning beyond what the schema's parameter description provides. Baseline 3 is appropriate.

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?

Clear verb+resource ('Get a Vinted user's profile') with specific detail on content (ratings, reviews, number of items, activity). Distinguishes from sibling tools like get_user_items which fetches user's item listings, and get_item_details which targets individual items.

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?

Implies usage context (fetching a user profile) but does not explicitly state when to use this vs alternatives, or when not to use it. The sibling get_user_items is related but not referenced as an alternative. No explicit exclusion criteria.

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