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

Goes past the annotations by disclosing the downstream consequence of 'confirm' (counts against vacation days and the plan), the 'reset' state transition back to pending, and the external notification side effect, which corroborates openWorldHint. It does not mention permission requirements or whether a rejected request releases any reserved balance, so it stops short of full behavioral disclosure.

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?

Front-loaded with the WRITE marker and tightly packed with no filler; every clause about the three actions earns its place. The trailing raw endpoint string ("PUT /absences/{confirm|reject|reset}") is low-value implementation detail for an agent.

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 two-parameter mutation with no output schema and annotations already covering safety hints, the description supplies the missing decision semantics, side effects, and id-discovery path. Residual gaps are minor: no permission prerequisites and no indication of what the response confirms.

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 baseline is 3; the description earns above that by explaining what each enum value actually does to the record, whereas the schema only says "The decision." It also tells the agent where to obtain absence_id, adding meaning the integer-typed field does not carry.

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?

Starts with an explicit "WRITE" marker and a specific verb+resource ("decide on an absence request"), then enumerates three distinct actions. An agent can immediately separate this state-transition tool from papershift_create_absence or papershift_list_absences without opening a schema.

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?

Gives clear operative context for each action mode and explicitly routes id discovery to papershift_list_absences. It never states the inverse – e.g. that new absences must be created via papershift_create_absence rather than this tool – so one exclusion gap remains.

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