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

No annotations are provided, so the description carries the burden. It discloses useful behavior beyond the schema, including that it returns the latest table ordered by grade and step and returns 404 for an unknown code, though it does not explicitly restate that this is a read-only lookup.

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 description is short and front-loaded: the first line names the operation, and the following sentences add only the necessary return behavior, filtering behavior, and special locality codes. There is no wasted text.

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 simple lookup tool with 3 parameters and full schema coverage, the description is nearly complete: it covers ordering, filtering, 404 behavior, and special locality codes. It does not spell out the exact returned fields, but the pay-table output is reasonably implied and no output schema exists.

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 coverage is 100%, so the baseline is 3. The description adds meaning beyond the schema by explicitly documenting `RUS` for Rest of U.S. and reinforcing `GS` as the base table, which helps the agent choose the correct locality code value.

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 states a specific verb and resource: return the latest GS pay table for a locality pay area, and it explains that grade and step narrow the rates. It is clear, but it does not explicitly distinguish itself from siblings such as search_opm_pay or get_opm_localities.

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?

It gives useful value guidance for `locality_code` (`GS` for base pay, `RUS` for Rest of U.S.), so the intended usage is implied. However, it does not explicitly say when to use this tool instead of alternatives like search_opm_pay or get_opm_localities.

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