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

No annotations are supplied, so the description carries the full disclosure burden. It does add genuine behavioral information beyond the schema, notably that the sub theater falls back to an Armor plan, but it never states the return form (code text vs. metadata), whether the tool is read-only, or any auth requirements.

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?

Two short sentences with the core purpose front-loaded. The quoted 'theater "sub"' phrasing and the ambiguous 'it also falls back' clause (what is 'it'?) add a small amount of noise but no wasted length.

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 single optional enum parameter with full schema coverage and no output schema, the description covers the basics. It is still thin on what the returned starter actually contains and on why an agent would pick this over the dedicated sub-starter sibling, which matters given the overlap.

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% and the enum values are already documented in detail in the schema itself. The description restates that 'sub' yields the Silent Service starter and adds the fallback note, which is marginal added meaning rather than new syntax or format guidance.

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 the resource concretely: a working JavaScript starter controller intended to be copied and improved. That is more specific than the bare name 'get_starter', though the second sentence's reference to the sub theater blurs the boundary with the sibling 'get_starter_sub' without resolving it.

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?

There is no statement of when to call this versus 'get_starter_sub' or 'get_started', despite those being direct alternatives in the sibling list. The only usage hint is the parameter-level note that theater='sub' returns the Silent Service starter, which describes behavior rather than selection criteria.

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