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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety is covered; the description adds that the response contains days, hours, address, host and link, which is genuinely useful given there is no output schema. It does not mention behavior when the id is unknown or invalid, so it is not exhaustive.

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 front-loaded sentence that leads with what the caller gets and ends with the parameter's origin. No filler or redundancy.

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 one-parameter read tool with full annotations and full schema coverage, the description covers purpose, workflow origin and returned fields without needing to explain values (no output schema exists). Only edge-case behavior for an unknown id is absent, which is a minor 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 coverage is 100% and the schema already documents the id with a format example, so the baseline is 3. The description adds provenance for the id (it comes from search_estate_sales), but nothing about format or constraints beyond the schema.

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 the specific resource (one estate sale) and enumerates the returned fields (days, hours, address, host, link), which makes the tool's job unambiguous. It also names search_estate_sales as the source of the id, so an agent can distinguish it from the search sibling without opening 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?

The phrase 'by the id search_estate_sales returns' establishes the required workflow: call search_estate_sales first, then this tool. There is no explicit when-not guidance or mention of the guide/route siblings, so it falls short of a full 5.

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