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

Annotations already declare a safe, idempotent, non-destructive read with no open-world access, so the safety profile is covered. The description goes further by disclosing the data provenance (exact City of Sunrise FL 2020 municipal bid rows), the return structure (low/median/high bid bounds plus scope, sources, and permit guidance), and an explicit accuracy caveat about historical bids.

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 sentences, front-loaded with the core purpose before the data-source and caveat details. Dense but every clause carries signal; only mild compression is possible.

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?

With no output schema, the description correctly carries the burden of describing returns (low/median/high bounds, scope, sources, permit guidance) and sets expectations about data vintage. It is nearly complete, though it omits any note on how unsupported inputs (e.g. local_quote gates) are handled in the result.

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% and the enum values are self-documenting, so the baseline is 3. The description's 'net non-gate length and gate widths' merely restates what the schema already says (including 'do not subtract them again'), adding no format or unit detail beyond the structured fields.

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 resource ('fence and gate costs') plus the exact inputs it works from (net non-gate length, gate widths). This cleanly separates it from cost siblings like driveway_cost, flooring_cost, and roof_replacement_cost without the agent needing to open the schema.

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?

Usage is implied by the calculator framing, and the closing caveat ('Historical public bid observations are not current homeowner prices') usefully bounds when the output is appropriate. However, it never states when to prefer this over sibling cost tools or what inputs make it unsuitable (e.g. non-Sunrise-FL locations, unsupported materials).

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