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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered; the description goes further by disclosing the return envelope ({"results": [...]}) and why it differs from the upstream array response. That is genuine context beyond structured fields, though it omits size/ordering details.

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?

Front-loaded with purpose, then usage, then return-shape note — a sensible ordering. The third paragraph about response wrapping is partly redundant given an output schema exists, but it is short and does not obscure the core statement.

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?

With no parameters, an output schema present, and annotations covering the safety profile, the description supplies everything an agent needs: what is returned, what it is for, and how the response is shaped. Nothing material is missing.

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?

Zero parameters, so the baseline is 4. The description usefully connects the output field (FIPS codes) to the parameter it feeds in get_state_profile, adding a semantic link the empty schema cannot convey.

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 and resource ("List all states with their FIPS codes and award totals") and immediately names the sibling consumer, get_state_profile(), so it is distinguishable from the profile tool. An agent knows exactly what this returns without opening the schema.

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?

Says explicitly that the FIPS codes produced here are the values to pass to get_state_profile(), which establishes the lookup-then-profile workflow. It gives no explicit exclusions or note about when another tool (e.g., spending_by_geography) would be preferable, so it stops short of full alternatives guidance.

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