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

With only readOnlyHint=true in annotations, the description adds real value: the newest-first ordering, the default fiscal-period scoping, and the exact fields returned. It does not mention pagination behavior or result-size limits, but the safety profile is fully covered by annotations.

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 dense sentence with the scope constraint and default behavior front-loaded, ending with the endpoint. Every clause carries information.

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 15-parameter list tool with no output schema, the description usefully enumerates the returned field set so the agent knows what a row looks like. Remaining gaps (pagination semantics, filter interaction) are covered by the schema's own descriptions.

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%, so all 15 parameters are documented in the schema. The description only reinforces fiscal_period_id's override behavior, adding no syntax beyond what the schema already provides; baseline 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?

States a specific verb (book/list) and resource (journal entries), enumerates the returned fields, and gives the sort order and endpoint. It is clearly distinguishable from the singular cashctrl_get_journal_entry sibling.

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?

It explains the default scope ('current fiscal period unless fiscal_period_id is set') but gives no guidance on when to use this list versus cashctrl_get_journal_entry or when to prefer the many filter flags. Usage is implied rather than stated.

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