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

Annotations already cover the safety profile (readOnlyHint, destructiveHint=false, openWorldHint=false), so the bar is lower. The description adds that deals span supermarket AND online and include old/new price plus discount, which tells the agent what data comes back, but says nothing about freshness, coverage per market, or rate limits.

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 compact sentence with the payload description front-loaded before the market constraint. Nothing is padded, though it is arguably under-specified rather than genuinely concise.

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 2-parameter read-only tool with no output schema, the description gives a decent picture of the returned data. However the nl/be restriction contradicts the schema's market enum and the winkel parameter is left entirely unexplained, leaving a real gap.

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 50%, so the description needs to compensate. It mentions market scope only, and does so inconsistently with the enum (nl/be vs six markets), while the 'winkel' parameter is never addressed at all.

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?

States a specific resource (actuele weekfolder-deals) plus the payload it returns (oude/nieuwe prijs en korting), which is enough to separate it from actuele_sales or verwachte_sales. It is clear but never names a sibling or a comparative condition.

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 only guidance is the scope constraint 'alleen voor markt nl/be', and that constraint conflicts with the schema enum that permits de/fr/es/uk. There is no statement of when to pick this tool over actuele_sales or beste_in_categorie.

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