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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds return-field context (statusLine, nextAction, vault/bond, repay progress, reclaim date), but says nothing about what happens when neither optional parameter is supplied, or when both are, which is a real gap for a tool with zero required params.

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?

A single dense sentence, front-loaded with the resource and lookup modes, with the return fields compactly bracketed at the end. Nothing is wasted, though the parenthetical list is compressed to the point of being terse.

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?

There is no output schema, so the description must and does enumerate the key returned fields, and it explains both parameters. What's missing is behavior for the degenerate cases (neither ID, both IDs), which matters given zero required parameters and additionalProperties=false.

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 0%, so the description carries the burden and does add meaning: loanId yields a single loan's status, botId yields the loans for that bot. The pattern constraints (^loan_/^bot_) are left to the schema, but the semantic role of each parameter is clearly conveyed.

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 names a specific resource (Desk loan) and two lookup keys (loanId vs botId), so an agent knows this is a read-only status lookup rather than a loan request (its sibling desk_request_loan). It does not explicitly name or contrast with any sibling tool, so it stops short of the top band.

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 implies two usage paths — fetch one loan by loanId or all loans for a botId — but gives no condition for choosing between them, no prerequisites, and no exclusions or error guidance. This is adequate implied usage rather than explicit when/when-not guidance.

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