kroger_get_fuel_points

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

No annotations are provided, so the description carries the full burden. The verb 'check' strongly implies a read-only operation, which is a useful behavioral hint. However, it does not disclose prerequisites like authentication (e.g., requiring login) or what exactly is returned, leaving some ambiguity.

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, concise sentence with no redundant information. It is immediately clear and front-loaded with the action and subject.

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 zero-parameter, no-output-schema tool, the description is largely sufficient. It names both the balance and rewards as outputs. However, it omits mention of any authentication requirements or whether the tool is usable before logging in, which is relevant given the existence of a login sibling.

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 tool has zero parameters, and the schema is empty with 100% coverage. Baseline for zero parameters is 4, and the description adds no further parameter details, which is acceptable since there are none.

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 states the tool's function with a specific verb ('Check') and resource ('current fuel points balance and available fuel point rewards'). It is easily distinguishable from sibling tools, which focus on shopping, cart, or checkout operations.

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 the tool is used to retrieve fuel points status but provides no explicit context on when to use it (e.g., before checkout) or any alternatives. Given the sibling list, no other tool covers fuel points, so usage is self-evident but not explicitly guided.

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