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 the safety profile is fully covered structurally. The description adds nothing beyond that — no statement of permissions, ordering, or what the 'source' payload represents — so it contributes essentially zero behavioral context.

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 same sentence is duplicated verbatim before the operation ID, which is pure waste rather than front-loading. The content that remains (operation ID plus a pointer to describe_operation) is short but carries no substantive information an agent could act on.

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 output schema, zero parameter descriptions, and three nested path identifiers, the description would need to explain both the returned resource and the path semantics. It does provide a useful escape hatch by naming describe_operation for native schemas, but otherwise leaves an agent unable to call the tool correctly from this definition alone.

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%, and the schema only constrains id/entryId/lineId as 1-2000 character strings with no meaning attached. The route template in the description weakly maps these to lease, journal entry, and line identifiers, which is the only semantic value added, but it never explains the untyped 'query' object or accepted formats.

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 is a verbatim repetition of the route template, which also appears in the title, so it restates structured data rather than explaining purpose. The path segments do hint that it retrieves the 'source' record for a specific journal entry line under a lease, but an agent gets no plain-language statement of what that resource actually is.

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 guidance on when to use this tool versus the many sibling lease/journal-entry endpoints (e.g. get_accounting_leases_by_id_journal_ent_* variants or get_journal_entries_by_id_*). The only implicit routing hint is the note that describe_operation provides native request schemas, which tells the agent to look elsewhere for details but not when this call is appropriate.

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