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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds no behavioral context beyond that: it does not say whether the result is a boolean, what happens for unsupported lines, or whether the lookup is deterministic. It essentially restates the purpose rather than disclosing behavior.

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 economical sentence with no wasted words, and the resource being checked (Aster, line, state) is front-loaded. The sentence-fragment construction is slightly awkward but costs nothing in length.

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 two-parameter, closed-world read with a fully documented schema, the description covers the core intent. However, with no output schema, it does not tell the agent what comes back (a yes/no flag, an appetite record, a reason string), which is the one meaningful gap.

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 the line enum documented and the state format ('Two-letter US state, like CA') spelled out in the schema. The description mirrors these inputs but adds no format or constraint detail beyond the schema, so the baseline of 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?

The description names the specific check being performed (whether Aster National Insurance Group writes a given line in a given state), which is clearly distinct from sibling tools like request_quote or agency_info. It is phrased as a fragment ('Whether...') rather than a verb+resource sentence, but the intent is unambiguous.

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 about when to call this versus agency_info, request_quote, or start_online_quote. The agent must infer that this is a pre-quote eligibility check, and no exclusions or prerequisites are stated.

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