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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and non-destructive, so the description does not need to restate safety. It adds useful behavioral context: the data source, the 65,000+ record scope, ranking by filings, and 'No API key required.' It does not cover response format or rate limits, but the annotation coverage lowers the burden.

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 compact: three sentences that each add value, covering dataset, source, ranking, metrics, audience, and auth. The 'Who broker-of-records whom' opener is memorable but slightly less direct than leading with 'Directory of benefits brokers.'

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 tool with three optional parameters and no output schema, the description communicates the dataset contents, source, ranking approach, key derived metrics, intended use, and authentication requirement. It does not enumerate exact response fields, but the schema covers pagination and the description names the core data attributes.

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 the schema already documents q, page, and state. The tool description adds no parameter-specific meaning beyond what the schema provides, so the baseline of 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?

The description clearly identifies the resource: a directory of 65,000+ benefits brokers from DOL Form 5500, with ranking, sponsor counts, and commission volume. It is distinct enough from siblings like get_lender_directory, but it does not explicitly contrast itself with any sibling and lacks a direct action verb like 'search' or 'look up.'

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 names target audiences and scenarios: carriers, broker M&A, benefits-tech sellers, and brokers scouting competitors. This gives implied usage context, but there is no explicit guidance on when to choose this tool over sibling tools or when not to use it.

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