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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered; the description adds the real behavioral detail that results come back paginated at 25 per page. It does not disclose auth requirements, ordering, what happens if the range spans more than 25 records beyond pagination, or the shape of each availability record.

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?

Three short fragments, front-loaded with the data meaning, then page size, then endpoint. The trailing 'GET /availabilities.' is marginally useful for debugging but borders on filler; otherwise nothing is wasted.

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 simple read-only list tool with full schema coverage and no output schema, most needs are met, but the description never indicates what fields an availability entry contains (start/end time, type, note), which an agent must know to use the result. Missing that, the definition is adequate rather than complete.

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 page numbering, yyyy-mm-dd formatting, and user_id are already documented in the schema; the baseline of 3 applies. The description's only added detail is the 25-record page size, which the schema also states, so it contributes little beyond the structured data.

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?

Names the specific resource (an employee's marked-available times) and the scope (between two dates, per employee), which separates it from siblings like papershift_list_absences or papershift_list_shifts. The verb is only implied by the name/title rather than stated, and no sibling is explicitly contrasted.

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?

There is no statement of when to use this versus the other list tools, nor any prerequisites (e.g. whether user_id must be a Papershift user from papershift_list_users). The usage is only inferable from the phrase 'between two dates', which implies a required bounded range.

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