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

Annotations already declare read-only, idempotent, open-world, and non-destructive behavior. The description adds useful context beyond annotations: results are paginated one page at a time, continuation uses next_offset, and absence types/reasons/notes are excluded from the response.

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 compact and front-loads the core purpose and pagination behavior. The final 'Read-only Smartplan Pro API' phrase repeats annotation information and is slightly redundant, but overall there is little waste.

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 six parameters, 0% schema description coverage, and no output schema, the description is too thin. It covers pagination and excluded fields, but an agent still lacks enough information to interpret the date parameters, status values, absentee filter, and expected page structure.

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 0%, so the description must carry parameter meaning, but it only explains pagination continuation via next_offset. It leaves start_date/end_date formats, the status enum values (W, A, D, C, DEL, A-AUTO), the absentee filter, and limit/offset semantics undocumented.

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 states a specific verb and resource: listing one page of absence dates for the selected account. It clarifies scope by excluding absence types, reasons, and notes, which helps distinguish it from a detail tool like smartplan_get_absence, though it does not name that sibling directly.

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?

It implies usage through pagination guidance ('continue with next_offset') and exclusion of detail fields, suggesting this is for lightweight absence-date listing rather than full absence retrieval. However, it does not explicitly say when to use this versus smartplan_get_absence or how the required start_date/end_date should be chosen.

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