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

Annotations already declare readOnlyHint/idempotentHint and closed-world scope, so the safety profile is covered. The description adds a real compliance constraint (no PII in queries), which is useful, but says nothing about matching behavior, ranking, or result scope beyond that.

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 short sentences, front-loaded with the action and followed by the input constraint. No wasted text, though 'public' is left slightly ambiguous.

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?

An output schema exists, so return values need no explanation, and the privacy constraint is present. However, with zero schema description coverage the agent still lacks any guidance on the limit parameter or what kind of keyword matching to expect.

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 coverage is 0%, so the description must compensate. It partially does for 'query' ('by preparation topic', general keywords), but gives no syntax hint and entirely omits 'limit' (default 5, max 10), leaving half the parameters unexplained.

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 ('Find public guidance') scoped by 'preparation topic', which is enough to separate it from read_refund_guide and get_refund_checklist, which are retrieval/checklist tools rather than search. It does not explicitly name those siblings as alternatives, so it stops short of a 5.

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?

The description gives an input constraint ('general keywords only, without taxpayer identifiers') but no when-to-use vs when-not-to-use framing and never mentions read_refund_guide or get_refund_checklist as the natural follow-ups. Usage is only implied.

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