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

The description goes beyond the readOnly/idempotent annotations by revealing the exact counting rule (once per borrower held), the lender definition fallback, and the source of the new-borrower and attribution metrics. It does not mention pagination or output formatting, but the annotations already cover the safety profile, so the added methodology is meaningful.

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 a single dense sentence, but every clause adds a distinct piece of information about the pair metric or scope. It is front-loaded with the core resource definition and then lists metrics in order; splitting the metric list into bullets would improve readability but the current form is still efficient.

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 tool with no output schema and six parameters, the description provides strong context for the pair definition and metrics, which is the hard part to infer. However, it omits the meaning of the sort enum and min_borrowers, and does not describe pagination or result shape, leaving a notable gap for a search tool.

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 50% and the description only mentions filtering by sponsor or lender id, which largely repeats what the schema already says for those two fields. The meanings of sort options, min_borrowers, limit, and cursor are left to inference, so the description does not compensate for the missing parameter documentation.

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 defines the tool's output as sponsor × lender pairs aggregated per borrower, and enumerates the metrics returned, so an agent can tell what this produces. It lacks an explicit verb and does not draw boundaries against similar siblings such as get_sponsor_lenders, so it is clear but not fully differentiated.

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?

No guidance is given on when to choose this tool over get_sponsor_lenders, search_sponsor_capital_providers, or search_private_credit. The only usage hint is the closing line 'Filter by sponsor or lender id,' which is a parameter instruction, not a selection guideline.

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