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

Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false, so the safety profile is covered. The description adds that the response includes the journal lines and names the REST endpoint, but says nothing about permissions, error behavior, or whether lines are paginated.

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?

Two short sentences, both front-loaded and waste-free, with the resource and return shape stated first and the endpoint as a compact second clause.

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 single-parameter read tool with no output schema, the description is nearly complete: it states what is fetched and that lines are included. An explicit mention of the error case (missing id) or the id source would make it fully complete.

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?

Only one parameter (journal_entry_id) with 0% schema description coverage, so the schema gives no format guidance beyond integer > 0. The description conveys 'by id' and the endpoint path, but does not clarify what IDs are valid or where to obtain them.

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: retrieve an accounting journal entry (comprobante) with its lines by id, plus the endpoint. This clearly distinguishes it from the laudus_list_journal_entries sibling, though it doesn't name that sibling explicitly.

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?

Usage is only implied: 'by id' signals this is the single-record fetch as opposed to a listing. There is no explicit when-to-use/when-not statement or direct pointer to laudus_list_journal_entries for lookups.

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