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

The annotations already cover readOnly, idempotent, non-destructive, and closed-world behavior. The description adds useful context by emphasizing 'static,' 'fixed,' and 'limits,' which tells the agent the output will not change dynamically and represents an authoritative bounded capability set. This goes beyond the boolean annotation hints without contradicting them.

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 concise sentence with no filler. Every phrase ('static sandbox authority,' 'fixed sources,' 'limits') carries meaningful scoping information that helps an agent understand exactly what the tool exposes.

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 zero-parameter, read-only capability discovery tool with no output schema, the description is sufficiently complete. It names the exact categories of information returned—authority, sources, and limits—and the annotations cover the behavioral safety profile.

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 has zero parameters, so the baseline is 4. There is no parameter schema to supplement, and the description appropriately focuses on the tool's content rather than inputs.

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 states a specific verb ('Describe') and a clear resource: the static sandbox authority, fixed sources, and limits. It does not explicitly differentiate from the sibling assess_trade_safety, but the scope is concrete enough that an agent can infer this is a capabilities/introspection tool rather than an assessment action.

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?

The description implies the tool is used to fetch static capability information about the sandbox, which gives some contextual usage guidance. However, it does not explicitly state when to prefer this over assess_trade_safety or mention any exclusions, so the usage guidance remains implied rather than explicit.

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