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

Annotations already indicate readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is clear. The description adds transparency about what the tool returns (specific fields, URL) and the option to filter by state, going beyond the annotations to disclose behavioral details such as the absence of user/workspace filtering. No contradictions exist.

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 concise at four sentences, each serving a distinct purpose: main function, optional filter, field listing, and usage guidance. The front-loaded first sentence immediately states the core action and scope, making it efficient for an agent to parse.

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?

Given the tool's simplicity (0 required params, output schema present) and rich annotations, the description is largely complete. It covers purpose, filter, output fields, and usage context. The only minor gap is that it doesn't mention pagination or rate limits, but for a straightforward list tool with one parameter, this is adequate.

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%, so the schema already fully documents the single parameter (state) with a clear description. The description reinforces this by mentioning the optional state filter, adding context about its purpose (discovering coverage) but not adding new syntax or format details beyond the schema. Given maximum schema coverage, a score of 4 is appropriate.

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 clearly states the tool lists every place dossier the observatory publishes, differentiating it from siblings like describe_place which drills into a specific place. It specifies the exact fields returned (city, state, slug, etc.) and mentions the optional filter by state, leaving no ambiguity about what the tool does.

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 description explicitly advises using this tool before calling describe_place to discover available place-level coverage, providing a clear usage sequence. It also includes a history note (renamed from list_cities) that helps an agent understand consistency with the content-type vocabulary, though it doesn't explicitly state when not to use it or list alternatives with exclusions—the purpose is sufficiently narrow that no further guidance is needed.

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