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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower; the description adds genuinely useful context beyond that — member-entered provenance, not lender-verified, private scope, and the caveat that business balances are not a personal guarantee or household net worth.

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?

Three compact sentences, front-loaded with the resource and contents, then provenance, then the usage caution. Dense but each clause carries information; no filler.

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 no-parameter, read-only tool with no output schema, the description supplies the provenance, scope, and caveats an agent needs to interpret the data correctly and to avoid overstating it (e.g., treating business balances as net worth). Return shape is unaddressed but that is minor here.

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?

The tool takes zero parameters, which is the baseline-4 case; there are no parameters whose semantics need explaining and the schema is empty.

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 clear verb ("Read") and a specific resource ("your own member-entered loans") plus an enumerated inventory of contents (borrower links, dated balances, payment/maturity terms). It distinguishes the data's provenance ("member-entered", "not lender verified", "private to you"), though it never names a sibling tool to contrast against.

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?

Implied usage is present — read this before "proposing a change" and reuse the exact ids and revisions — but there is no explicit when-to-use versus alternatives or when-not-to-use guidance against the many sibling getters.

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