list_no_income_tax_states

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered without description effort. The description adds only the completeness scope ('all US states'), which aligns with openWorldHint=false, but contributes no further behavioral context such as data recency or sensitivity to changing tax law.

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 description is a single, 9-word sentence with every word earning its place and no filler or redundancy. The core scoping ('all US states with no state income tax') is front-loaded.

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 0-parameter lookup whose output schema exists and whose annotations cover safety, the definition is nearly complete: an agent knows exactly what to invoke and what it will get. The only minor gap is the absence of a temporal caveat that state income-tax status can change over time.

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?

The tool has zero parameters and its input schema is trivially 100% covered, so there is nothing for the description to explain. Per the zero-parameter baseline of 4, the description needs no parameter documentation and adds appropriate value by narrowing the query scope.

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 uses a specific verb ('List') with an unambiguous resource ('all US states with no state income tax'), making the tool's scope instantly clear. It is inherently distinct from siblings like get_state_tax_info (per-state detail), compare_state_taxes (comparison), and analyze_relocation_taxes (relocation scenarios), none of which provide this exact filtered list.

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 explicit when-to-use or when-not-to-use guidance is given, and no alternatives are named. An agent must infer from the tool's name and clear scope that it is the right choice for a flat enumeration task, rather than being told to prefer compare_state_taxes for comparative analysis or get_state_tax_info for state-specific detail.

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