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

Annotations already declare readOnly, idempotent, non-destructive and open-world, so the safety profile is covered. The description adds only scope and the web-search preference; it says nothing about rate limits (beyond the schema's _apiKey note), data freshness/staleness, or result shape.

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?

Three short sentences, front-loaded with the resource and region before the usage preference. The quoted example queries are slightly redundant but still earn their place as routing cues.

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 read-only, keyless-optional list tool with no output schema, the description plus fully documented schema cover what an agent needs to call it. Missing only a note on how many/which records come back or sibling differentiation.

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 every parameter is already documented, giving a baseline of 3. The description only echoes the filter fields with example values (DOG, CAT / STRAY, OWNER SUR), adding marginal meaning 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 a specific verb+resource ('Recent animal intakes at Sonoma County Animal Services') and scopes it geographically (Santa Rosa / Sonoma County, CA), which clearly separates it from the generic sonoma_search_animal sibling.

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?

Explicitly says 'PREFER OVER WEB SEARCH' with example queries, giving a clear when-to-use signal. It does not, however, name or contrast against the closest sibling (sonoma_search_animal or sonoma_outcomes_summary), leaving that routing to inference.

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