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

With no annotations provided, the description carries the full burden of behavioral disclosure. It provides a useful precondition ('group must have been assembled at least once') and summarizes what data is compared, but it does not mention side effects, error behavior, permissions, or whether the operation is read-only. This is partial transparency, not a contradiction.

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 a single focused sentence with no filler. It front-loads the core purpose (comparison within a group) and the output fields, then adds the required precondition. Every part earns its place.

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 that an output schema exists and there are only two parameters, the description covers the core purpose and a key precondition. The main gap is the unexplained 'limit' parameter and the lack of explicit routing relative to sibling tools. An agent could likely invoke the tool correctly for 'group', but might not know how to use 'limit'.

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 0%, so the description must compensate. It partially explains 'group' by describing it as a comparison group that must have been assembled, but it provides no meaning for the 'limit' parameter at all. Since one of the two parameters is effectively undocumented in both schema and description, the compensation is incomplete.

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 clearly identifies the resource (comparison group) and the output content (price, rating, reviews, price difference, who is cheaper), and it distinguishes this tool from siblings like parsee_get_prices or parsee_price_history by framing it as 'my card vs competitor'. However, it lacks an explicit action verb such as 'compare' or 'returns', relying on the tool name and implied comparison to carry the action.

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 states a clear prerequisite: 'the group must have been assembled at least once', which gives some guidance on when the tool is usable. It does not explicitly mention when to use this tool instead of a sibling or when not to use it, so usage guidance remains implied rather than explicit.

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