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

Annotations already provide readOnlyHint=true, and the description adds meaningful behavior: it returns a GeoJSON FeatureCollection, includes pagination, and shows a detailed example response. It does not contradict the read-only annotation, and while it leaves out auth/rate-limit caveats, the added context is solid.

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 defining sentence is front-loaded and precise, and the long example response is justified because there is no output schema. The only weakness is that the example is shown truncated, which slightly weakens structural completeness, but the summary alone already carries the essential purpose.

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 tool with 15 parameters and no output schema, the description plus 100% parameter descriptions is quite complete. The response example compensates for the missing output schema and the readOnly annotation covers safety behavior. The main gap is the absence of explicit guidance on when to prefer sibling tools.

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%, so the schema already documents all 15 parameters. The tool description adds a high-level grouping of capabilities and an example response, but it does not add parameter-level semantics beyond what the schema provides, so the baseline 3 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 opens with a specific verb-resource pair: Returns a GeoJSON FeatureCollection of all current emergency incidents. The word current clearly separates it from historical and single-incident tools, and the statement of filtering, pagination, and bbox support establishes the tool's purpose precisely.

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 all current emergency incidents implies the primary use case, and filtering/pagination/bbox suggest general query scenarios. However, the description never names alternatives such as get_incident, list_historical_incidents, or nearby_incidents, nor does it state when not to use this tool, so routeing to siblings is left to inference.

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