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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so safety behavior is covered. The description adds no context beyond the route and an operation ID — nothing about auth, error behavior when the id doesn't exist, or the shape of the returned entry.

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?

Very short and front-loaded, which is good, but the identical sentence is duplicated verbatim and the operation ID plus describe_operation note add no decision value for an agent already holding the schema.

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?

No output schema exists, so the description should explain what a retrieved journal entry contains, yet it does not. Combined with 0% parameter coverage and no usage framing, the definition is too thin for an agent to call it correctly without falling back to describe_operation.

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 0% for 2 params (one required nested 'id'), and the description says nothing about what 'id' refers to, its format, or what the optional 'query' object accepts. The pointer to describe_operation shifts the burden rather than compensating.

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 only restates the route 'GET /api/journal-entries/:id' twice; the verb+resource can be inferred as 'fetch a single journal entry by id', which does distinguish it from the list sibling get_journal_entries_4e2a52706b38f69973605254. But no prose sentence tells the agent what a journal entry is here or what the call is for.

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 versus the sibling list tool or the other journal-entry endpoints (e.g. get_accounting_journal_entries_true_up, get_journal_entries_readiness). The only routing hint is 'describe_operation provides native request schemas', which is a schema-fetch instruction, not usage guidance.

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