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

Annotations already declare readOnly=true, idempotent=true, destructive=false, openWorld=false, and the description is consistent with that by stating it 'opens nothing by itself'. It adds the useful fact that output is a step-by-step procedure rather than an executed change. The final sentence about Quinyx's REST API and missing MCP server is justification for the tool's existence, not behavior of this call, so it adds little operational value.

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 critical constraint ('opens nothing by itself') and the handoff to cotlet_browser_* are front-loaded and clear. But the third sentence, comparing to Quinyx's official REST API and listing things the API cannot do (approve requests, offer shifts, attest hours, publish a schedule), is lengthy background that does not help an agent invoke this tool.

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 parameterless, read-only instruction tool with no output schema, the description covers what matters: it returns a step-by-step procedure and does not act on its own. It stops short of describing the shape of the returned steps or how to feed absence specifics into the subsequent browser actions, which would have made it fully self-contained.

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?

There are zero parameters, so the schema-based baseline would be 4. However, the absence of any input means the agent is never told how to supply the absence details (employee, date, absence type) that the returned instructions must cover, so the description leaves a real semantic gap in a zero-param design rather than merely restating the schema.

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 first sentence names a specific verb and resource ('Add absence in the user's own Quinyx account') and is immediately corrected by 'Returns how to do it in Quinyx step by step... and opens nothing by itself', which tells the agent this is an instruction-generating tool rather than a mutating one. That clarification prevents the name/title from misleading, though the opening phrasing still reads as if the tool performs the absence creation.

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 states the workflow split explicitly: this tool returns step-by-step screens/buttons/fields, then the agent must execute via 'the cotlet_browser_* tools in the user's Quinyx Cloud Browser'. That is clear routing guidance. It does not state when NOT to use it or how it relates to siblings like quinyx_approve_request or quinyx_create_shift.

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