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

Annotations already declare readOnlyHint=true, openWorldHint=false and idempotentHint=true, so the safety bar is lower. The description still adds real value beyond that: it opens nothing by itself, it returns instructional content (screens, buttons, fields), and it notes the official API exists but is read-only. What is missing is any note on the shape/length of the returned instructions.

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 purpose is front-loaded, but the second sentence is a run-on that fuses three ideas (return shape, no side effects, next-step tooling) into one clause joined by a semicolon. The qualifier "Bokadirekt's official API: Yes, but it only reads" is informative but syntactically loose and could be stated plainly.

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 no parameters and no output schema, the description carries the burden of explaining what comes back, and it does roughly so by describing step-by-step instruction output. The remaining gap is that an agent cannot tell how large or structured that instruction payload is, but nothing essential to invoking the tool is absent.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate. Baseline 4 applies; the description does not need to compensate for any schema gap.

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 ("List bookings in the user's own Bokadirekt account") and disambiguates from the customer/waitlist listers by naming the resource scope. Crucially it also reveals the tool returns step-by-step instructions rather than booking data, which the name alone would mislead about. It does not explicitly contrast with siblings like bokadirekt_find_available_times or bokadirekt_list_waitlist.

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 prescribes the follow-up path ("then do it with the cotlet_browser_* tools in the user's Bokadirekt Cloud Browser"), which is genuine workflow guidance. However, there is no statement of when to choose this over bokadirekt_list_customers or bokadirekt_list_waitlist, and no prerequisites or when-not-to-use conditions.

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