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

The annotations already establish a safe, read-only, idempotent operation, so no further safety disclosure is required. The description adds a meaningful behavioral constraint: demo mode is limited to 2026, telling the agent about a year limitation beyond what the schema shows.

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?

One sentence with the action and resource front-loaded, followed by a concise limitation note. Every phrase earns its place; there is no redundant schema repetition or filler.

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 simple 2-parameter, read-only reference lookup, the description is mostly sufficient. However, tool has no output schema and the description does not describe the response shape, allowed filing statuses, or how production vs demo mode behaves, leaving gaps an agent must resolve.

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 0%, and the description does not define valid values for year or filing_status. It only implies through domain context which year and status should be used, and the only explicit extra is the 2026 demo limitation. Key information like acceptable filing_status strings is missing.

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 ('Return') and enumerates the exact coverage: federal bracket, standard deduction, mileage, retirement, and filing deadlines. It distinguishes itself from sibling tax_* tools by framing this as a 'combined' reference summary, not a single-topic lookup.

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 alternative-routting guidance is provided. The word 'combined' implies the intended use case is needing several tax reference values at once, but it does not explicitly tell an agent when to choose this tool over tax_federal_brackets, tax_standard_deduction, or tax_deadlines.

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