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

No annotations are present, so the description carries the full burden. It states only that this is the first question, not what invoking it does such as presenting a question, initializing state, or returning choices, and it does not mention side effects or follow-up behavior.

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 no wasted words or repeated schema content. It is front-loaded with the tool's role and the decision-guide context.

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 parameterless starter tool, the entry-point context is present, and sibling names hint at the surrounding workflow. However, with no output schema and no annotations, the description should have said what the agent receives after calling or what the next step is; that is missing.

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 describes them completely, so there is nothing for the description to add. The baseline of 4 applies because no parameter documentation is needed.

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 identifies the tool as the entry point to a specific decision guide, 'Own, fractional, jet card or charter', which makes its role clear from the name and title. It does not use a strong action verb or explicitly contrast with checker_answer/checker_tree, so it stops short of a 5.

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?

No explicit guidance is given about when to call this tool versus checker_answer, checker_tree, or the enquiry_* siblings. The phrase 'first question' implies it should be used before the rest of the flow, but the description leaves that inference to the agent.

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