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

With no annotations provided, the description carries the behavioral burden and does disclose key traits: the return is iCalendar text, there is one event per step, times are floating local times with no time zone, and Friday maps to day 0. It does not mention permissions or error behavior, but the core output semantics are unusually well specified for an unannotated tool.

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 two tight sentences with no filler. The output format and time-zone behavior are front-loaded, and the friday format note follows naturally.

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 four-parameter tool with no output schema and no annotations, the description gives enough detail about the returned iCalendar format and time semantics for an agent to call it correctly. It could mention whether a published itinerary must already exist, but the essential context is present.

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 100%, so the schema already documents all four parameters. The description mainly reiterates that friday is a YYYY-MM-DD date and adds the Friday=day 0 semantic, which is useful but marginal beyond the schema baseline.

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 returns a published itinerary as iCalendar text for one weekend, which is a specific resource and output format. It does not explicitly distinguish itself from sibling tools such as get_published_itinerary, but the iCalendar framing is distinctive enough for an agent to understand the purpose.

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 phrase 'for one weekend' and the Friday=day 0 convention imply usage context, but the description gives no explicit when-to-use guidance or alternatives. It does not say when to choose this over get_published_itinerary or what prerequisites apply.

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