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

Annotations already declare readOnlyHint=true, openWorldHint=false, destructiveHint=false, so the safety profile is covered. The description adds genuinely useful behavior beyond that: the result is a full record including SyncToken (relevant for subsequent updates) and that batch Id lookups are supported in one call.

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 tight sentences, front-loaded with the core purpose, then the highest-value non-obvious details. Nothing wasted and no repetition of the exhaustive schema text.

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, the description helpfully characterizes the return (full records with SyncToken). Pagination and filtering details live in the schema, so the pairing is adequate; only a note on result ordering or default limits would improve it.

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%, with criteria operators, case-sensitivity, AND semantics, pagination, and inactive-record handling all documented in the schema. The description only echoes one usage pattern (Id IN) already covered there, so baseline 3 is appropriate.

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 ("Search department records") scoped to QuickBooks Online, and clarifies the payload shape. It implies the search/get distinction but never names the sibling get_department it is offsetting against.

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?

Provides real usage context: because results are full records with SyncToken, a follow-up get is unnecessary, and multiple known Ids can be read in one call with Id IN. Clear when-to-use guidance, though no explicit when-not conditions or boundaries versus other search_* tools.

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