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

readOnlyHint=true already declares the safety profile, so the description only needs incremental context. It adds the date-range scoping and names the underlying endpoint, but says nothing about pagination behavior, defaults, or how the 'free seats' framing interacts with the only_booked/only_not_booked filters.

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?

Two short sentences, front-loaded with the core behavior. The API endpoint reference earns little for an agent but costs only a clause.

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?

With 13 optional parameters, no output schema, and no annotation beyond read-only, the description leaves return shape, pagination, and default filtering unexplained. The 'free seats' framing is also potentially misleading given only_booked and only_not_booked filters exist.

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 100%, so all 13 parameters are already documented in the schema. The description only echoes the date-range and seat concepts, adding no format, default, or interaction detail beyond the schema; 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: listing departures with free seats across activities within a date range. It is clear what the tool returns, though it does not differentiate itself from the sibling trekksoft_list_activity_availabilities.

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 guidance on when to use this versus trekksoft_list_activity_availabilities or the activity endpoints, and no stated prerequisites or exclusions. The agent must infer selection from the name alone.

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