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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds the domain detail that status can be open, locked, or closed, which hints at whether a year is usable for posting, but it says nothing about ordering, pagination behavior, or whether locked years affect downstream writes.

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?

A single compact sentence fragment that front-loads the resource and then the relevant fields. There is no waste, though the fragmentary style (colon list) sacrifices a little readability for brevity.

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 no output schema, the description usefully names the returned fields and the status vocabulary, which is the main thing an agent needs. Pagination and return shape are handled by the schema and annotations, so remaining gaps are minor.

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% with only two optional pagination parameters, both fully documented in the schema including the next_offset hint. The description adds no extra parameter meaning, so the baseline of 3 applies.

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 name plus description together clearly state the resource (accounting/fiscal business years) and the fields involved (start, end, status), so an agent knows what a call returns. It does not explicitly say 'list all' nor name a sibling it must be distinguished from, but the resource is narrow enough to be unambiguous against siblings like bexio_list_business_activities.

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 tool, when not to, or which alternative to prefer. The agent must infer that it fetches fiscal periods rather than, say, filter them by other tools.

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