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

Annotations already cover readOnly, idempotent, non-destructive, closed-world. The description adds substantive context beyond that: every row has an `active` flag plus a matching disclosure sentence, verification is a property not a filter, nothing is excluded by default, and no internal ids/PII/evidence hashes are exposed. This is valuable transparency about data composition and privacy. Missing: pagination behavior (limit max 200, default 25 is in schema) and whether results are sorted or truncated.

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 prose is front-loaded with the tool's scope but runs long and includes some repetition (verification as property vs filter, and the active flag plus matching disclosure sentence). Some sentences could be tightened, but it's not bloated to the point of harming usability.

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 read-only search tool with no output schema and full param coverage, the description gives a complete picture of what is returned (all verified lenders, active flag, disclosure sentence, no PII/ids) and how filtering works. It could mention pagination or sorting, but that is a minor gap given the annotations already signal safety.

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 baseline is 3. The description adds meaning by explaining that the `active` parameter filters only on the active/not-active attribute and never on verification, and that omitting it returns both — clarifying semantics beyond the schema's own wording. That extra guidance lifts it slightly above baseline.

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 (Search) and resource (FreeRateUpdate's lender universe), and clarifies the scope: every verified company including inquiry-only entities exactly as published on freerateupdate.com. This distinguishes it from the sibling get_lender_score, which presumably returns a score for one lender rather than a searchable list.

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?

Usage is implied by the search verb and the q/limit/state params, but there is no explicit when-to-use or when-not-to-use guidance, nor a named alternative. It doesn't say when to use this vs get_lender_score or get_network_rate_summary.

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