2026 quarterly estimated tax

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

No annotations exist, so the description carries the full burden. It does disclose scope and a useful caveat (planning estimate, not tax advice) and signals that safe-harbor rules and IRS due dates are included in the result, but it says nothing about determinism, assumptions baked in (single state flat rate, QBI default), or what the response looks like.

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, zero filler, with the scope and the enumerated outputs front-loaded before the disclaimer. Slightly compressed to the point that the input contract is never addressed, but nothing is redundant.

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 an 11-parameter, zero-required calculator with no output schema and no annotations, the description is adequately complete on scope and caveats, and it lists the outputs produced. The remaining gap is guidance on which optional inputs are needed for which scenario (e.g., prior_year_* for safe harbor, w2_wages for MFJ), which an agent must infer.

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% across all 11 parameters, so the schema already documents each field, including the enum and QBI default. The description adds no parameter-level meaning beyond naming output concepts; in particular it never clarifies the net_profit vs. ytd_profit+months alternative, which is the one genuinely ambiguous input choice.

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 (estimate) and a tightly scoped resource: US federal 2026 freelancer/sole-proprietor taxes, enumerating the four outputs (SE tax, income tax, safe-harbor payment, due dates). It is clearly distinguishable from generic siblings, though it never says whether it duplicates or supersedes self_employment_tax/due_dates/tax_figures, which overlap directly with the listed outputs.

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 only usage frame is the audience phrase 'for a freelancer or sole proprietor' and the disclaimer 'Planning estimate, not tax advice.' There is no statement of when to call this versus self_employment_tax, due_dates, or tax_figures, and no mention of what inputs produce a valid result.

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