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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, and the description reinforces rather than contradicts them by saying the tool 'opens nothing by itself.' It adds genuinely useful behavioral context — the return value is human-readable step-by-step UI guidance (screens, buttons, fields) requiring a handoff to browser tools — which annotations cannot express.

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 operational content is front-loaded in two effective sentences, but the third sentence is a long digression on Bokio's public REST API, pricing plans, private integration tokens and OAuth 2.0 registration that has no bearing on invoking a zero-parameter instruction tool. That paragraph adds bulk without helping the agent call or interpret 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 zero-parameter, no-output-schema tool, the description covers what matters: what it returns (step-by-step screens, buttons, fields) and what the agent must do next. The only gap is the absence of any detail about what the returned steps look like or how to verify success after performing them, which would help on a multi-step handoff.

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 no parameter semantics to explain and the description cannot be faulted for omitting syntax or formats. The baseline for a parameterless tool is a 4, and the description goes slightly further by implying the behavior is fully determined by the calling context (the user's own account).

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 (journal entry in the user's Bokio account) and immediately corrects the misleading name by clarifying that the tool 'Returns how to do it in Bokio step by step... and opens nothing by itself.' That said, the first clause still reads like a creation operation, so an agent must parse two sentences before realizing this is an instruction-generation tool, not a writer.

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 gives an explicit follow-on path: 'then do it with the cotlet_browser_* tools in the user's Bokio Cloud Browser,' which tells the agent exactly what to call after this one. It does not, however, distinguish this from siblings like bokio_create_invoice or state when not to use it, so routing among the bokio_* tools is only partly resolved.

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