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

Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false, so safety is covered. The description adds 'newest data included', giving a hint about ordering/recency, and exposes the GET route; it does not discuss pagination behavior or response shape, but with annotations carrying the safety profile this is adequate rather than rich.

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?

One front-loaded sentence naming the record types, followed by the endpoint path. Every element is compact; the endpoint string is mildly redundant with the name but costs little.

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 paginated list tool with 5 params and no output schema, the description covers what is being listed but says nothing about ordering guarantees beyond 'newest', empty results, or how paging interacts with sorting. The schema fills most of the parameter gap, leaving the description merely sufficient.

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 page, limit, sort_by, sort_dir and animal_id are all documented in the schema itself. The description adds nothing beyond implying that animal_id identifies 'one animal' — baseline 3 is correct when the schema does the heavy lifting.

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 names the concrete resource (weight, height, temperature, condition score, fecal-count records) and scopes it to a single animal, which lets an agent separate it from farmbrite_add_animal_measurement and farmbrite_get_animal. The verb is left implicit — only the title says 'List' — so it is clear but not maximally sharp.

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 implies retrieval of an animal's measurement history, but never states when to choose it over siblings such as farmbrite_get_animal or farmbrite_add_animal_measurement, nor any prerequisites (e.g., a valid animal id must already exist). Usage is inferred rather than instructed.

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