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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, openWorldHint=false, so the safety profile is fully covered. The description adds nothing beyond that — no indication of what the 'explanation' payload is, its size, or any auth/rate-limit 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 URL line is duplicated verbatim, which is pure waste, and there is no front-loaded statement of purpose. The operation ID and describe_operation pointer are the only non-redundant content.

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, two undocumented nested parameters, and a highly ambiguous resource name ('explanation'), so the description is the only place an agent could learn what is returned — and it says nothing. Inadequate for this complexity.

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 both required params (id, entryId) are undocumented bare strings with only min/max length. The description could clarify that id is the lease and entryId the journal entry, but it does not, leaving the agent to infer from path ordering alone.

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 just the raw URL path repeated twice, which restates the tool title rather than explaining it in prose. The path does hint at verb (GET) and resource (a lease journal entry's 'explanation'), but no sentence says what that explanation contains or returns.

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?

No guidance on when to use this versus the many sibling lease/journal-entry endpoints (e.g. get_accounting_leases_by_id_journal_ent_29a7792a..., get_journal_entries_by_id_981714fc...). The only pointer is 'describe_operation provides native request schemas', which is a schema-routing hint, not a usage rule.

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