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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds one piece of behavioral context beyond that—the apiKey authorization requirement—but says nothing about return shape, pagination, or scope limits, so it earns a modest 3.

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?

Two short sentences with the primary purpose front-loaded and no filler. The bundling of three distinct resources in one clause is slightly dense but not wasteful.

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 single-parameter read-only getter with no output schema, the description names the three data sets it returns and the auth requirement, which is enough for an agent to call it correctly. It could say more about what the response looks like, but the gap is minor.

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?

There is a single parameter with 100% schema description coverage ('The unique farm ID'), so the schema already documents it fully. The description merely restates that farmId is required and adds no format or constraint details beyond the schema; baseline 3 applies.

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 (Retrieve) and enumerates the resources returned: active feed inventory, feed purchases, and feed mill logs. This is clear enough that an agent can tell it is a read of feed-related data, though it does not explicitly contrast itself with the write-side sibling log_feed_purchase.

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 only states a precondition (farmId and apiKey) and gives no when-to-use guidance, no exclusions, and no named alternatives despite many sibling get_/log_ tools. An agent must infer usage from the name alone.

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