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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower. The description goes beyond them by disclosing the computed output: time-relative T-72/T-24 deadlines plus prioritized overdue/missed steps, which effectively substitutes for the absent output schema.

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 front-loaded sentence that names the action first and then the produced content. No filler, no repetition of the title, nothing that fails to earn 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?

For a 12-parameter tool with no output schema, the description covers purpose and roughly what is returned, and the schema covers the inputs. However, it gives no guidance on tool selection among siblings and no note on how the many optional budget/pace parameters influence the checklist, leaving a 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 description coverage is 83%, so the schema already documents nearly every parameter including departureDate's Berlin/UTC day arithmetic and enum/range constraints. The description adds no parameter-level meaning, so the baseline 3 applies.

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 verb and resource ('Erstellt eine Checkliste') plus the exact content it produces (T-72/T-24 deadlines, prioritized due/missed steps). It is clear and concrete, though it never names or distinguishes itself from the sibling 'create_trip_plan', leaving the agent to infer the boundary.

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 'Last-Minute' framing implies a pre-departure context, but there is no explicit when-to-use, when-not, or routing advice toward compare_travel_offers or create_trip_plan. An agent cannot tell from the text which of the three planning tools is appropriate here.

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