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

With no annotations, the description carries the full behavioral burden and does so well: it discloses the return cardinality (exactly one, or possibly report_first/done), the quota constraints (at most 3 unreported sites, up to 50 per key), and the stateful binding of product_type on first issuance. These are non-obvious traits an agent could not infer from the schema alone.

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?

Front-loaded with the identification header, then workflow, then constraints, then the alternative. Dense and multi-clause, but nearly every clause carries distinct information; only slight compression could tighten it.

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 explain returns, and it does (one directory, report_first, or done) plus quotas and state binding. It stops short of explaining what report_first requires from the agent, leaving a small gap, but the tool is usable as documented.

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 the baseline is 3, but the description adds real meaning: the key is a 'Submit Kit key' (context) and product_type 'is bound on first issuance' (stateful, one-shot semantics beyond the schema's 'first call only').

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?

Names the resource (launch directories) and states precisely what comes back: 'Returns exactly one next directory when available.' The verb is implicit (an iterator-style fetch) rather than explicit, but an agent can distinguish it from siblings like recommend_directories and get_submission_status.

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?

Gives the triggering condition ('when working through launch directories with a required Submit Kit key'), the follow-up workflow ('submit there, then call report_result'), and an explicit alternative for a different need ('For a free overview list, use recommend_directories'). This is textbook when-to-use/when-not guidance.

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